Deep Dish Taco Squares

Yet another recipe typed on a card, from an unknown source.

1/2 pound ground beef
1/2 cup dairy sour cream
1/3 cup mayonnaise or salad dressing
1/2 cup shredded sharp Cheddar cheese (about 2 ounces)
1 Tbsp. chopped onion
1 cup Bisquick baking mix
1/4 cup cold water
1 to 2 medium tomatoes, thinly sliced
1/2 cup chopped green pepper

Heat oven to 375°F. Grease square baking dish, 8x8x2-inches. Cook and stir ground beef until brown; drain. Mix sour cream, mayo, cheese and onion; reserve. Mix baking mix and 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. Sprinkle with paprika if desired. Bake until edges of dough are light brown, 25 to 30 minutes. Makes 5 or 6 servings.