Biscuits and Gravy Casserole (Vegetarian)

Ingredients

• buttery cooking spray
• 1 (16.3 ounce can) refrigerated biscuit dough (We used Pillsbury Grands Southern Homestyle.)
• 1 pound vegetarian sausage (We used Tofurky Original Sausage Italian.)
• 1 can (15 ounces) low sodium black beans, drained
• 1 cup fat free mozzarella cheese, shredded
• 8 large egg whites
• 2 large whole eggs
• 1/2 cup fat free milk
• 1/4 tsp. salt
• 1/4 tsp. Black pepper
• 2 cups fat free milk
• 1 package (2.64 ounce) sausage flavor gravy mix (We used McCormick Sausage Flavor Country Gravy Mix.)
• 1/2 cup sharp cheddar cheese