Sausage, Egg and Vegetable Casserole

Prep :30 minutes       Bake : 1 hour      Serves :8

1½                lb. pork breakfast sausage, casings removed
1                   small onion, chopped
½                  large red bell pepper, seeded and chopped
½                  large green bell pepper, seeded and chopped
4                   oz. mushrooms, chopped
9                   large eggs
3                   cups milk
1                   teaspoon salt
1                   tablespoon Dijon mustard
3                   slices white bread, torn into 1-inch pieces
1½                cups shredded Cheddar
 1.           Mist a 9-by-13-inch baking dish with cooking spray. If baking immediately, preheat oven to 350ºF.
2.           In a skillet over medium heat, cook sausage, stirring and breaking up chunks, until no longer pink, 5 to 6 minutes. Transfer to a bowl. Drain skillet of all but 1 Tbsp. fat.
3.           Add onion to skillet and cook, stirring, for 3 minutes. Add bell peppers and mushrooms; sauté for 5 minutes. Transfer to a bowl; let cool.
4.           Whisk eggs, milk, salt and mustard. Stir in bread, Cheddar, sausage and vegetables. Pour into dish. Bake until middle is set and edges have browned, 50 to 60 minutes, or cover with plastic and refrigerate for up to 24 hours, then bake.