cook and stir ground beef and onion in large skillet, until beef is browned; drain if needed.

stir in taco seasoning, tomato sauce, refried beans, green chilies, and sliced black olives, simmer

Preheat oven to 375°F. Grease baking dish. 12 x 7-1/2 x 2 inches.

mix together Bisquick, cornmeal, milk, 1 egg, and vegetable oil. beat vigorously 30 seconds. spread in dish. spoon beef mixture over dough.

mix sour cream, the other egg, and cheese together. spread over beef mixture

bake 30 minutes. let stand 10 minutes before cutting