1/2 lb. ground beef
1/2 c. sour cream
1/3 c. mayonnaise
1/2 c. grated cheddar
1 tbsp. chopped onion
1 c. Bisquick
1/4 c. cold water
1-2 tomatoes, sliced thin
1/2 c. chopped green pepper

Heat oven to 375 degrees. Grease square baking dish, 8 x 8 x 2 inches. Cook and stir ground beef until brown; drain. Mix sour cream, mayonnaise, cheese and onion; reserve. Mix Bisquick with water until soft dough forms. Pat in pan, pressing dough 1/2 inch up sides. Layer beef, tomatoes, and green pepper in pan; spoon sour cream mixture over top. Bake until edges of dough are light brown, 25-30 minutes.