Heat oven to 375 degrees. Grease 8-inch square baking dish. Cook and stir ground beef until brown; drain. Mix sour cream, mayonnaise, cheese, and onion; reserve. Mix baking mix and water until soft dough forms. Pat in the pan, pressing dough ½ up the sides. Layer beef, tomatoes and green pepper in pan; spoon sour cream mixture over top. Sprinkle with paprika if desired. Bake until edges of the dough are light brown, 25 to 30 minutes.
Yield: 5 or 6 servings