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.

You will also love this spaghetti squash quiche with balsamic vegetables and cottage cheese zucchini quiche!

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.

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.

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.

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

More Quiche Recipes to Try

• Crustless broccoli quiche
• Crustless spinach quiche
• Crustless zucchini quiche
• Instant Pot egg bites
• Crustless zucchini pie

More Spaghetti Squash Recipes

• Spaghetti squash chicken alfredo
• Butter chicken spaghetti squash
• Spaghetti squash breakfast