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A freshly baked meal prep breakfast casserole, ready for the week ahead.

Classic Meal Prep Breakfast Casserole

This classic meal prep breakfast casserole is packed with protein and vegetables, making it a perfect grab-and-go option for busy mornings. Prepare it ahead of time for a delicious and nutritious start to your day.
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Prep Time 15 minutes
Cook Time 35 minutes
Total Time 50 minutes
Servings: 8 slices
Course: Breakfast
Calories: 280
Ingredients Equipment Method Notes

Ingredients
  

Main Ingredients
  • 12 large eggs
  • 1/2 cup milk dairy or non-dairy
  • 1/2 cup shredded cheddar cheese plus more for topping
  • 1 cup cooked breakfast sausage crumbled
  • 1 small bell pepper diced
  • 1/2 small onion diced
  • 1 cup fresh spinach roughly chopped
  • Salt to taste
  • Black pepper to taste
  • red pepper flakes Optional: a pinch of

Equipment

  • Baking Dish
  • Skillet/Pan
  • Large Bowl
  • Whisk

Method
 

Preparation
  1. Preheat your oven to 375°F (190°C) and lightly grease a 9x13 inch baking dish.
  2. Sauté diced bell pepper and onion in a pan for 3-5 minutes until softened.
  3. In a large bowl, whisk together eggs, milk, salt, and pepper until well combined.
Assembly and Baking
  1. Spread the cooked sausage evenly over the bottom of the prepared baking dish.
  2. Top with the sautéed bell pepper, onion, and fresh spinach, then sprinkle half of the shredded cheddar cheese over the vegetables.
  3. Carefully pour the egg mixture over the ingredients, gently shaking the dish for even settling.
  4. Sprinkle the remaining shredded cheese over the top and bake for 30-35 minutes until set and golden brown.
  5. Let the casserole cool for 5-10 minutes before slicing and serving.

Notes

This casserole can be made ahead of time and stored in the refrigerator for up to 3-4 days. Reheat individual portions in the microwave or oven. For an extra kick, add a pinch of red pepper flakes to the egg mixture. You can experiment with different vegetables like mushrooms, zucchini, or sweet potatoes. Make sure the sausage is fully cooked and crumbled before adding it to the casserole.