Chili Casserole With Cornmeal Topping

1  pound  ground beef 
1  small  onion -- chopped 
1  clove  garlic -- chopped 
1   tablespoon  chili powder -- (up to 2)  
1         tablespoon  bisquick baking mix
3        tablespoons  water
1                can  tomatoes
1                can  whole kernel corn -- drained  
1                can  chopped pitted ripe olives -- drained 
1 1/2      teaspoons  salt    
    3/4       cup  bisquick baking mix     
    3/4           cup  cornmeal  
    2/3   cup  milk  
1            egg 

Heat oven to 350 degrees.
Cook and stir beef, onion and garlic until brown, drain.
Mix chili powder, 1 Tbsp. baking mix and 3 Tbsp. water; add to beef.
Stir in tomatoes, corn, olives and salt.
Heat to boiling.
Pour into ungreased square baking dish, 8x8x2 inches, or 2 quart round casserole
Mix 3/4 cup baking mix, the cornmeal, milk and egg; pour over beef mixture
Bake until golden brown, 50 to 60 minutes.