Spaghetti Squash Quiche with kale and mushrooms is baked in a light spaghetti squash crust and made extra flavorful with a creamy cheese blend.

You will also love this spaghetti squash quiche with balsamic vegetables!

A slice of spaghetti squash quiche with kale and mushrooms with a fork on a plate.

Spaghetti squash is a vegetable with a noodle-like flesh and a slightly sweet taste.

It can easily replace pasta in a casserole like spaghetti squash casserole, make a low carb noodle boat like these stuffed spaghetti squash boats, and now form a crust in this meaty and delicious gluten-free spaghetti squash quiche. Why not?!

Why You’ll Love This Recipe

  • Relatively easy recipe: You don’t have to squeeze the liquid out or worry about any extra steps. Once pressed in a pie plate, spaghetti squash noodles easily replace traditional flour crust without extra carbs.
  • Delicious: Cheesy, meaty, and so full of flavor, it melts in your mouth. Warm or cold, I love it both ways. I’m a huge fan of mushrooms and combined with leafy greens like kale, you can’t go wrong. This combination will blow your mind!
  • Lighter: Besides swapping traditional crust for a spaghetti squash one, I replaced some cheese with cottage cheese and swapped a few eggs with egg whites. More protein and less fat.
  • Classic taste: You won’t miss any cheese in this healthy spaghetti squash pie.

Ingredients for Spaghetti Squash Quiche

You’ll need a handful of nutritious ingredients and a few simple spices to make this spaghetti squash quiche recipe.

  • Spaghetti squash: The main ingredient for the low-carb, gluten-free crust. Pick a medium sized squash around 2.5 pounds.
  • Brown mushrooms: I like brown mushrooms for their deep, earthy flavor. Choose from portobello, cremini, or shiitake mushrooms.
  • Kale: Adds a healthy dose of greens to your meal. I used dinosaur kale (also known as lacinato kale).
  • Eggs and egg whites: The filling is made with 2 large eggs and 1 cup of egg whites.
  • Aromatics: Caramelized onion and fresh garlic add flavor and aroma to the dish.
  • Cheese: Shred 1 cup of your favorite cheese. I used a 3 cheese Italian blend but mozzarella, cheddar, gouda or Swiss cheese also compliment mushrooms and kale nicely.
  • Cottage cheese: A bit of low fat cottage cheese adds a creamy texture and ups the protein.
  • Seasonings and herbs: Onion powder or garlic powder, salt, pepper, and dried thyme.
  • Cooking spray: I like Misto.

How to Make Spaghetti Squash Quiche with Kale and Mushrooms

Homemade mushroom kale quiche is a three-part recipe – the crust, the filling, and the assembly. It looks complicated but it’s an easy weekend meal, trust me!

Scroll down for the full recipe card.

How to separate cooked spaghetti squash into strands and make quiche crust with it.

Start off by cutting and baking some squash. If you need a refresher, I have posted a full series about how to cut open spaghetti squash.

For this recipe, you need a bit undercooked squash. I recommend to bake spaghetti squash halves or make air fryer spaghetti squash in air fryer. The longer the squash cooks and if the process involves steam, the more liquid it releases. And we don’t want to end up with a hot mess as the quiche bakes with a filling inside.

Then form a crust with your hands. Just press spaghetti squash noodles to the sides and bottom of a pie dish. I used a deep pie dish but regular one will work just fine. I added a few spices to the crust as well. Nothing complicated – salt, ground black pepper and thyme.

How to saute kale and mushrooms, prepare egg mixture and assemble the quiche.

Then sauté your mushrooms until they are nice golden brown color, just enough to release the excess liquid. Transfer to a bowl.

Then sauté the kale. I added spices to kale on purpose, do not skip this important step to an aromatic spaghetti squash quiche. Trust me, I tested this recipe 3 times.

Whisk eggs, cottage cheese, cheese and spices together. Then mix kale and mushrooms with the liquids, just until combined.

Pour into the crust and press with spatula to dunk all vegetables in the liquid. This way the veggies won’t dry out as the quiche rises. You could even open the oven after 20 minutes of baking and press again.

Looking down on baked spaghetti squash quiche with kale and mushrooms in a pie dish.

I baked my spaghetti squash pie for 50 minutes. Check with a knife and if it comes out clean, your quiche is ready.

Like with any casserole or pie, let it cool to ensure proper slicing, about 30 minutes. You might have to lift the edges of the crust with a knife a bit. Alternatively, you could spray the pie dish edges with cooking spray before adding the ingredients to it.

Tips for Best Results

These top tips help make this vegetable quiche so delicious, everyone will be excited for breakfast.

  • Cook spaghetti squash al dente: If overcooked, the squash strands can become too watery. To form a firmer crust, the squash noodles need to be al dente. I don’t recommend to bake whole spaghetti squash or make spaghetti squash in Instant Pot.
  • Be sure vegetables are covered: Kale and mushrooms should be fully submerged in the egg mixture, so they don’t dry out.
  • Cool quiche before cutting: That little bit of cooling time allows the inside to cook more, the outside to cool, and the flavors to “marry” each other. Your quiche will be perfectly warm, taste better, and be easier to slice.
  • About cottage cheese: Do not worry, cottage cheese will melt and incorporate with other ingredients beautifully. It will not curdle and you will not taste it.

Serving Suggestions

Delicious mushroom kale quiche can be served any time of day! It’s an easy make ahead brunch recipe, a savory breakfast to serve your guests, a veggie-loaded lunch, and a light dinner.

If you like fruit in the morning, serve it alongside a zesty fruit salad, healthy apple bread, or a small bowl of quinoa granola with fresh fruit.

For a fuller meal, serve with oven roasted sweet potatoes or a simple side salad like simple butter lettuce salad.

How to Store

Store: Refrigerate covered, or transfer to an airtight container for 3 or 4 days.

Freeze: I do not like to freeze this vegetable quiche leftovers, in my experience the texture is off once thawed.

FAQs

Can I replace egg whites with eggs?

Yes, you can use 6 large eggs total and omit the egg whites. You can also just take a measuring cup and fill up with cracked eggs until 1 cup is reached to replace 1 cup egg whites.

Can I make it dairy-free?

Yes, you can use any melting dairy-free cheese instead of regular cheese. To replace cottage cheese, use 2-3 extra eggs and the quiche should set.

Can I use spinach instead of kale?

Yes, feel free to substitute an equal amount of spinach. Keep in mind it won’t need as much sautéing time at the start as it wilts faster.

What else can I use instead of mushrooms?

If you don’t have mushrooms on hand or don’t like them, I recommend sautéed bell peppers instead.

Does the crust get crispy?

No. The spaghetti squash quiche crust will be firm and hold its shape but it will not get crispy.

More Quiche Recipes to Try

More Spaghetti Squash Recipes

Sliced quiche in the pie dish showing texture inside.
A slice of spaghetti squash quiche with kale and mushrooms with a fork on a plate.

Spaghetti Squash Quiche with Kale and Mushrooms

Spaghetti Squash Quiche with kale and mushrooms is baked in a light spaghetti squash crust and made extra flavorful with a creamy cheese blend.
5 from 15 votes
Servings 8 servings
Calories 179
Diet Gluten Free
Prep Time 10 minutes
Cook Time 1 hour 20 minutes
Total Time 1 hour 30 minutes

Equipment

Ingredients 
 

For the Crust:

  • 1 medium spaghetti squash about 2.5 pounds
  • 1/2 teaspoon thyme
  • 1/2 teaspoon onion powder or garlic powder
  • 1/4 teaspoon salt

For the Filling:

  • 3 cups brown mushrooms sliced
  • 1 medium onion finely chopped
  • 5 large garlic cloves minced
  • 2 cups kale stems removed, chopped & packed (I used dinosaur kale)
  • 2 large eggs
  • 1 cup egg whites
  • 1 cup mozzarella, cheddar, gouda or swiss cheese shredded (I used 3 cheese blend)
  • 1 cup cottage cheese
  • 2 teaspoon onion powder or garlic powder
  • 1 1/2 teaspoon dried thyme divided
  • 1/2 teaspoon salt divided
  • 3/4 teaspoon ground black pepper divided
  • Cooking spray I use Misto

Instructions 

  • Preheat oven to 400 degrees F. Cut squash in half, scoop out the seeds and place cut side down on a baking sheet lined with parchment paper. Bake for 30 minutes, remove from the oven and set aside to cool.
  • Meanwhile, preheat large skillet on high heat and spray with cooking spray. Add mushrooms and saute for 5 minutes or until golden brown, stirring occasionally. Transfer to a medium bowl.
  • Return skillet to medium-high heat and spray with cooking spray. Add onion and garlic and cook for 2 minutes, stirring frequently. Add kale, 1/2 teaspoon thyme, 1/4 teaspoon salt and 1/4 teaspoon pepper and saute until kale is wilted. Transfer to a bowl with mushrooms and set aside.
  • To make the crust, separate spaghetti squash into strands with a fork. Add to a medium bowl along with thyme, onion powder and salt, and mix to combine. Transfer to a deep pie dish and press evenly on the bottom and sides using your hands. Set aside.
  • In a large bowl, combine eggs with egg whites and whisk for 30 seconds. Add cheese, cottage cheese, previously cooked mushrooms and kale, 2 teaspoons onion powder, 1 teaspoon thyme, 1/4 teaspoon salt, 1/2 teaspoon pepper and mix to combine.
  • Pour into prepared crust and flatten with spatula to make sure all vegetables are covered with liquid. Bake in 400 degrees F oven for 50 mins or until the knife inserted comes out clean.
  • Let quiche cool down for at least 30 minutes. Cut into 8 slices and serve hot or cold.

Notes

Store: Refrigerate covered for up to 3 – 4 days. Do not freeze.

Nutrition

Serving: 1slice | Calories: 179kcal | Carbohydrates: 15g | Protein: 14g | Fat: 8g | Saturated Fat: 4g | Cholesterol: 60mg | Sodium: 497mg | Fiber: 3g | Sugar: 6g
Course: Dinner
Cuisine: North American
Author: Olena Osipov
Did you make this recipe?Mention @ifoodreal or tag #ifoodreal!

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About Olena

Welcome! I grew up in Ukraine watching my grandma cook with simple ingredients. I have spent the last 11 years making it my mission to help you cook quick and easy meals for your family!

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Comments

  1. 5 stars
    Loved this. Had a huge spaghetti squash and about 3 plus cups left over and it worked out very well in this recipe. I left out the extra shredded cheese, just used cottage cheese 2& which I love in recipes, and it was still great to us. Used spinach instead of kale this time as had that on hand. I liked the way the spaghetti squash with just seasoning on it made the crust part. 50 minutes it was perfect. Will make again. A favorite Thank you

  2. 5 stars
    Worth a second try. I was over generous with the kale and mushrooms so ended up having to add more egg. Deep dish is an understatement lol. I had to bake it in a casserole dish.

    I’m going to try it with spinach next time. I’m so lazy, I hate fussing with kale spines. Though the kale is hardy and gives the dish a great texture.

    I might blind-bake the crust on low for a bit or leave the cooked spaghetti squash to drain in a sieve to make it drier. My quiche was too wet. I had to bake it for 2+ hours to get rid of the water in the middle. I’m sure being so “deep-dish” added to the cook time. I was relieved my quiche wasn’t eggy or rubbery in spite of the long bake time. I did decrease the oven temperature to 350F for the last 45 minutes because I was worried about the burning the crust with the longer bake time.

    I love the spaghetti squash crust. Cool idea and it works.

  3. Could I use something else instead of Spaghetti Squash, i wish i liked it but probably the only vegetable i don’t

  4. This was great! The squash crust is soft but delicious. I didn’t add thyme at all. I used only one garlic clove minced and only 1/2 tsp garlic powder. Next time I will add only half as much salt – it’s very salty- and I am a salt lover. My husband and I ate the whole quiche for dinner.

  5. I find it hard to cut an uncooked spaghetti squash in half. Any suggestions? I usually cook it whole, let it cool, then cut it and scrape out the seeds.

    1. Hi Lee. Yes, it is absolutely nearly impossible. This is the only way I cut spaghetti squash: with a serrated bread knife while pounding on it with a meat tenderizer or basically a hammer. Slowly, it will cut through and voila. Also, bright yellow squash’s skin is harder than light yellow, if you have a choice at the store.

      1. I’ve also microwaved the spaghetti squash a bit before trying to cut it. Works well and safer. Look forward to trying the recipe!

    2. 5 stars
      I am currently making this as I am typing this, it was pretty easy, considering I am making spaghetti squash boats this week of planning as well. I had always had terrible luck with cutting squash, then I tried something new. I cut the skin on the squash, just slightly puncturing into the meat on where I want to cut. I stick that whole squash in the microwave 5-6 minutes. I let it cool for about 5 minutes and then cut into it. It is super easy and I was very happy with the result. I then roasted it according to recipe or taste. I had the worst luck with squash since my skin breaks out and peels really bad for days everytime I handle squash. Since then, I don’t have that nearly as much, or sometimes not at all. I hope this helps.

    3. Poke your squash several times with a sharp knife and microwave it for 5 to 8 minutes depending on size (medium/large). When you take it out it will slice like butter. Scoop it out, add your seasonings and fats, then roast flesh side down. Let it rest a moment before cutting because it does get hot.

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