Croissant Breakfast Casserole

I love make ahead breakfast casseroles to serve during the holidays. This is adapted from a Southern Living recipe in which they used ham instead of ground pork. Personally, I prefer sausage so I changed the recipe slightly. This is easy and quick to assemble and can sit in the refrigerator overnight. Pop it in the oven the next morning for a delicious breakfast! I like to serve fruit salad on the side to complete the meal.

Croissant Breakfast Casserole

A quick make ahead breakfast casserole and can feed a large group. This can be assembled the night before and then put it in your refrigerator overnight. Bake it in the morning and enjoy!
Prep Time20 minutes
Cook Time1 hour
Course: Breakfast
Cuisine: American
Keyword: cheese blintz, breakfast casserole, brunch, breakfast, eggs,
Servings: 12
Author: Adapted from Southern Living

Equipment

  • 11 x 7 baking dish
  • Skillet

Ingredients

  • 1 lb ground sausage
  • 2 tbsp olive oil
  • 1 medium Vidalia onions or other sweet onions
  • 3 cups fresh chopped baby spinach
  • 6 large eggs
  • 2 cups whole milk
  • 2 tsp Dijon mustard
  • 1/2 tsp smoked paprika
  • 1 tsp kosher salt
  • 1 tsp black pepper
  • 6 ounces fontina cheese shredded (about 1 1⁄2 cups), divided
  • 1 pound about 15 day-old mini croissants

Instructions

Step 1

  • Cook ground sausage, drain fat and set aside. In a skillet, oil over medium and stir in onions. Cook, stirring occasionally, until deeply browned, about 30 minutes. Add spinach; cook, stirring often, until wilted, 1 to 2 minutes. Transfer onion mixture to bowl with sausage.; let cool 10 minutes.

Step 2

  • Whisk together eggs, milk, mustard, smoked paprika, salt, and pepper. Add egg mixture and 1 cup of the cheese to bowl with onion mixture, and stir to combine. Arrange croissants, slightly overlapping, in 2 rows in a lightly greased 11- x 7-inch baking dish. Pour mixture over croissants. Sprinkle with remaining 1⁄2 cup cheese. Cover with aluminum foil, and chill 8 hours or up to overnight.

Step 3

  • Preheat oven to 375°F. Uncover casserole, and place on a large rimmed baking sheet. Bake in preheated oven until golden brown and center is set, about 1 hour. Shield with foil after 25 minutes, if needed to prevent excess browning.

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