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Easy Make-Ahead Breakfast Casserole Recipe

Easy Make-Ahead Breakfast Casserole Recipe


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4.7 from 21 reviews

  • Total Time: 1 hour 15 minutes
  • Yield: 8 1x

Description

Hearty breakfast casserole from Mexico blends savory sausage, eggs, and cheese in a comforting morning dish. Layers of rich ingredients promise a satisfying start that you’ll savor with family and friends.


Ingredients

Scale

Meats and Protein:

  • 1 pound ground pork sausage
  • 12 large eggs

Vegetables and Aromatics:

  • 4 cups crusty bread, cubed
  • 3/4 cup yellow onion, chopped
  • 2 cloves fresh garlic, minced
  • 2 cups bell peppers, chopped
  • 1 cup fresh mushrooms, sliced
  • 1 cup fresh spinach, roughly chopped

Seasonings and Additional Ingredients:

  • 1 teaspoon olive oil
  • 1 teaspoon dried rosemary or Italian seasoning
  • 1/4 teaspoon salt
  • 1/8 teaspoon black pepper
  • 2/3 cup milk or half-and-half
  • 1 cup cheddar cheese, shredded

Instructions

  1. Generously coat a 9×13 inch baking dish with non-stick spray, ensuring complete coverage for easy serving.
  2. Crumble sausage in a large skillet over medium-high heat, cooking until browned and fully separated into small pieces.
  3. Incorporate diced onions, minced garlic, sliced peppers, chopped mushrooms, and fresh spinach into the sausage, sautéing until vegetables become tender and release their moisture.
  4. Distribute bread cubes evenly across the prepared baking dish, creating a foundational layer.
  5. Arrange the seasoned sausage and vegetable mixture uniformly over the bread cubes, ensuring balanced coverage.
  6. Whisk eggs with milk, grated cheese, salt, and black pepper until ingredients are thoroughly integrated and smooth.
  7. Gently cascade the egg mixture across the casserole, allowing it to seep between the sausage and bread layers.
  8. Seal the dish with plastic wrap and refrigerate for a minimum of 30 minutes or up to 12 hours to allow flavors to meld.
  9. Preheat oven to 375°F and remove casserole from refrigerator 15 minutes before baking.
  10. Bake uncovered for 40-45 minutes, watching for a golden-brown surface and firm center, indicating complete cooking.

Notes

  • Swap Protein Easily substitute sausage with turkey, ham, or plant-based alternatives for dietary preferences or health goals.
  • Reduce Gluten Use gluten-free bread cubes or substitute with sweet potato or cauliflower base for lower-carb options.
  • Enhance Flavor Add fresh herbs like thyme, rosemary, or chives to elevate the dish’s taste profile and complexity.
  • Meal Prep Portion and freeze individual servings for quick grab-and-go breakfasts during busy mornings.
  • Prep Time: 30 minutes
  • Cook Time: 45 minutes
  • Category: Breakfast
  • Method: Baking
  • Cuisine: American

Nutrition

  • Serving Size: 8
  • Calories: 300
  • Sugar: 2 g
  • Sodium: 450 mg
  • Fat: 18 g
  • Saturated Fat: 6 g
  • Unsaturated Fat: 10 g
  • Trans Fat: 0 g
  • Carbohydrates: 20 g
  • Fiber: 2 g
  • Protein: 18 g
  • Cholesterol: 220 mg