This croissant breakfast casserole really is low-fuss. No need to have fresh croissants, even day-old ones work just fine! High quality croissants go stale pretty quickly so its perfectly fine to use stale ones.

This breakfast croissant casserole goes great with any other brunch items. Since it already includes the popular breakfast foods of eggs and croissants, you would serve this alongside some breakfast potatoes and fresh fruit.

Ingredients

• Non-stick cooking spray
• 6 large croissants, torn into 2-inch pieces
• 1 (7-ounce) jar roasted red peppers, drained and chopped
• 1 (5.2-ounce) package garlic and fine herbs spreadable cheese, cubed
• 6 eggs, well beaten
• 2 cups 2% milk
• 2 tablespoons Dijon mustard
• 2 tablespoons snipped fresh thyme
• 1 tablespoon snipped fresh parsley
• ½ teaspoon kosher salt
• ½ teaspoon black pepper
• For the mushroom mixture:
• 1 tablespoon vegetable oil
• 5 shallots, coarsely chopped
• 1 (8-ounce) package sliced baby bella mushrooms
• 1 (8-ounce) package sliced button mushrooms
• ½ teaspoon kosher salt
• ¼ teaspoon black pepper

Directions

1. In a large skillet, heat oil over medium-high heat. Sauté shallots, mushrooms, ½ teaspoon salt and ¼ teaspoon pepper for 5-7 minutes; set aside.
2. Spray 9×13-inch baking pan with non-stick cooking spray. In order, layer half of the croissant pieces, mushroom mixture, red peppers, cheese cubes and remaining croissant pieces.
3. In a large bowl, whisk together eggs, milk, mustard, herbs, ½ teaspoon salt and ½ teaspoon pepper. Pour over croissant mixture. Cover and refrigerate several hours or overnight.
4. Heat oven to 350 F.
5. Bake, uncovered, until center is set, about 55-60 minutes. Allow to set 5-10 minutes more before serving.

Storage, reheating and freezing

• Once cooled, transfer any leftovers to an airtight container or cover the casserole dish with foil. Store in the fridge for up to 5 days.
• To reheat, warm this croissant breakfast casserole in the microwave or toaster oven. Enjoy again!
• To freeze this breakfast casserole, we recommend cutting into squares and placing in a freezer safe container. Then you can thaw and reheat each serving on its own.

Looking for more brunch options? Check out these Quiche Recipes.