Easy Veggie-Packed Healthy Breakfast Casserole
This high-protein healthy breakfast casserole is packed with lean turkey, spinach, and bell peppers. A perfect make-ahead breakfast casserole for busy weekday mornings.
This healthy breakfast casserole is the solution for anyone who wants a hot, nutritious meal without standing over a stove at 7:00 AM. Unlike traditional bakes that rely on heavy creams or processed canned soups, this version uses sharp cheddar and plenty of fresh vegetables to provide deep flavor and satisfying texture.
By combining lean ground turkey with a dozen eggs, you get a high protein breakfast casserole that keeps you full until lunch. It is incredibly versatile; you can swap the kale for spinach or use whatever peppers are lingering in your crisper drawer.
The best part is how well this works as a make ahead breakfast casserole. You can assemble the entire dish the night before and slide it into the oven while the coffee brews, or bake it on Sunday and reheat individual squares throughout the week.
Ingredients
Protein and Produce
- 1 lb (450g) lean ground turkey or chicken sausage
- 1 medium yellow onion, diced
- 2 large bell peppers (red and green), diced
- 4 cups (120g) fresh baby spinach or chopped kale, packed
- 2 cloves garlic, minced
- 1 tablespoon olive oil
Egg Base
- 12 large eggs
- 1/2 cup (120ml) whole milk or unsweetened almond milk
- 1 teaspoon kosher salt
- 1/2 teaspoon freshly cracked black pepper
- 1/2 teaspoon smoked paprika
- 1 cup (115g) sharp cheddar cheese, shredded
Instructions
- 1
Preheat your oven to 375°F (190°C) and lightly grease a 9x13 inch baking dish with olive oil or non-stick spray.
- 2
Heat a large skillet over medium-high heat with one tablespoon of olive oil. Add the ground turkey and cook, breaking it into small crumbles, until browned and cooked through.
- 3
Add the diced onion and bell peppers to the skillet with the turkey. Sauté for 5-6 minutes until the vegetables have softened.
- 4
Stir in the minced garlic and spinach. Cook for just 1-2 minutes until the spinach is wilted, then remove the skillet from the heat.
- 5
Spread the meat and vegetable mixture evenly across the bottom of the prepared baking dish.
- 6
In a large mixing bowl, whisk together the eggs, milk, salt, pepper, and smoked paprika until the yolks are fully incorporated and the mixture is slightly frothy.
- 7
Stir half of the shredded cheddar cheese into the egg mixture, then pour the eggs over the vegetables in the baking dish.
- 8
Sprinkle the remaining cheese over the top of the casserole.
- 9
Bake for 30 to 35 minutes, or until the center is set and the edges are lightly golden brown.
- 10
Let the casserole rest for 5-10 minutes before slicing into squares to allow the eggs to firm up.
Tips
- → Squeeze your greens: If using frozen spinach instead of fresh, make sure to thaw it and squeeze out every drop of excess moisture to avoid a watery casserole.
- → Don't overbake: The casserole will continue to firm up as it cools. Pull it out when the center has just a slight jiggle.
- → Add a kick: If you like heat, add a diced jalapeño to the vegetable sauté or serve the finished squares with plenty of hot sauce.
FAQ
Can I make this healthy breakfast casserole ahead of time?
Yes. You can assemble the entire casserole, cover it with foil, and refrigerate it overnight. In the morning, bake it as directed, adding 5-10 minutes to the cook time since it's starting from a cold temperature.
How do I prevent my breakfast casserole from being soggy?
Sogginess usually comes from watery vegetables. Ensure you sauté the onions and peppers long enough to cook off their moisture, and never add raw frozen vegetables directly to the egg mix.
How long does this stay fresh in the fridge?
This casserole keeps beautifully for up to 4 days when stored in an airtight container. It's an excellent option for weekly meal prep.
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