Preheat oven 350°F.

Cook ground beef and onion, until beef is brown, drain if needed.

Spoon into greased 8 X 8 inch baking dish.

Stir in taco seasoning , tomato sauce, and corn

Sprinkle with cheese

Mix baking mix, milk, and egg together, mix well. Pour this over cheese

Bake for 35 min. Until light brown

Serve with sour cream , chopped tomatoes, and shredded lettuce if you desire