Air Fryer Breakfast Casserole is quick and easy frittata with veggies, cheese and optional sausage or hashbrowns. Meal prep for breakfast or serve during the holidays.
Preheat air fryer at 400 degrees F for 5 minutes. Line basket of air fryer with parchment paper making sure to position it evenly in the center, so there is enough room to hold egg mixture on all sides. Trim off sticking out corners.
Add mushrooms, bell pepper, red onion, 1/4 tsp salt and pepper. Air fry for 15 minutes, shaking and stirring once.
In the meanwhile, in a medium bowl add eggs, milk, 1/4 tsp salt, pepper and whisk well.
Remove basket from the air fryer, add spinach and stir with small spatula until a bit wilted and distributed evenly. Sprinkle with Parmesan cheese and carefully pour egg mixture on top. Bake at 300 degrees F for 20-30 minutes or until toothpick inserted in the middle comes out clean.
Cut into 8 slices with a serrated knife and enjoy hot or cold.
Video
Notes
Store: Refrigerate in an airtight container for up to 5 days. Reheat in an air fryer at 350 degrees F for 5 minutes or in a microwave for a few minutes.
Freeze: Freeze for up to 3 months. Thaw on a counter for 2-3 hours or in the fridge overnight.
Hash browns: Add frozen and thawed hash brown potatoes. You could also use fresh potatoes.
Meat: Add chopped fresh or crumbled bacon, sliced deli ham or crumbled sausage together with vegetables to pre-cook. Bacon or sausage doesn't have to be pre-cooked as it will cook in the 20 minutes of cooking time.
Other vegetables: There are tons of vegetables that you can use within this air fryer breakfast casserole. These include broccoli florets, asparagus, zucchini, shredded carrot, olives, sun-dried tomatoes, etc. Try green beans like I use in vegetable frittata!