Weekend Brunch Casserole

1 pound ground sausage
2 cups shredded mozzarella cheese
1 (8 oz) can refrigerated crescent dinner rolls
8 eggs, beaten
3/4 cup milk
1/3 cup chopped onion
1/4 teaspoon salt
1/8 teaspoon black pepper

Preheat oven to 425 degrees. Crumble and cook sausage in medium skillet over medium heat until browned. Drain grease. Line bottom of greased 13x9 inch baking dish with crescent roll dough, firmly pressing perforations to seal. Sprinkle with sausage and cheese. Combine remaining ingredients in medium bowl until blended; pour over sausage. Bake 15 minutes or until set. Let stand 5 minutes before cutting into squares; serve hot. Refrigerate leftovers. Yield: 8 servings