This sourdough breakfast casserole is the ultimate make-ahead breakfast! It's an easy recipe packed with sourdough bread chunks, breakfast sausage, and melty cheddar cheese.
Spray a 13x9 inch baking dish with non-stick spray. Set aside.
In a large skillet brown sausage until fully cooked. Drain and set aside.
1 pound ground breakfast sausage
In a large bowl mix together eggs, mustard and milk, until well combined.
8 eggs, 1 Tablespoon Dijon mustard, 2 cups milk
Place about 1/2 of the bread cubes into the bottom of the prepared baking dish. Spread in a single layer. Sprinkle with 1/2 cup of the cheese, and all of the sausage.
6 cups sourdough bread, 1 cup sharp cheddar cheese
Pour the egg mixture evenly over the sausage.
Sprinkle the remaining bread and cheese evenly over the top, and gently press down until most of the bread is covered.
Wrap with plastic wrap, and place in the fridge overnight.
In the morning, remove from the fridge and bring to room temperature.
Preheat oven to 350 degrees. Bake for 45-55 minutes until a knife comes out clean.