Overnight Brunch Casserole

Ingredients

• ***For the casserole:***
• 3 tablespoons butter, divided
• 2 tablespoons all-purpose flour
• 1/2 teaspoon salt
• 1/8 teaspoon pepper
• 2 cups fat-free milk
• 5 slices of reduced-fat American cheese, chopped
• 1 1/2 cups fresh mushrooms, sliced
• 2 green onions, finely chopped
• 1 cup ham, fully cooked and cubed
• 2 cups egg substitute
• 4 large eggs
• ***For the topping:***
• 3 slices of whole-wheat bread, cubed
• 4 teaspoons butter, melted
• 1/8 teaspoon paprika