Italian Ground Beef Casserole with Biscuit Topping

INGREDIENTS

1 lb

ground beef

1/2 cup

chopped onion

salt and pepper

3/4 cup

water

1 8 ounce can

tomato sauce

1 6 ounce can

tomato paste

2 cups

shredded mozzarella cheese

1 1/2 cups

frozen peas, carrots and corn (or any mixed vegetables), thawed

1 16 ounce can

refrigerated flaky layer biscuits

1 tbsp

butter, melted

1/2 tsp

dried oregano, crushed