Caramelized Onion Prosciutto Brie Swiss Croissant Breakfast Casserole
Ingredients
- 10 oz day-old croissants ((about 12 mini croissants or 6 regular))
- 4 tablespoons unsalted butter ((divided))
- 2 medium white onions ((thinly sliced))
- kosher salt and pepper
- 2 cloves garlic ((minced or grated))
- 2 teaspoons dried thyme
- 1 cup heavy cream
- 1 cup milk
- 4 eggs ((beaten))
- 2 tablespoons dijon mustard
- 1/2 teaspoon cayenne pepper ((more or less to taste))
- 4 ounces prosciutto ((torn))
- 4 ounces creamy Brie cheese ((rind cut off & cubed))
- 1 cup Swiss cheese ((shredded))
- 2 tablespoons everything bagel seasoning
Instructions
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