1 lb. ground beef
1 1/2 c. chopped onion
1/2 tsp. salt
1/4 tsp. pepper
3/4 c. Bisquick baking mix
1 1/2 c. milk
3 eggs
2 tomatoes, sliced
1 c. shredded Cheddar or process American cheese

Heat oven to 400 degrees. Grease 10 x 1 1/2 inch pie plate. Cook and stir beef and onion in skillet until beef is brown; drain. Stir in salt and pepper; spread in plate.

Beat Bisquick, milk and eggs with wire whisk or hand mixer until smooth, about 1 minute. Pour into plate. Bake 25 minutes. Top with tomatoes and cheese. Bake until knife inserted in center comes out clean, 5-8 minutes. Cool 5 minutes. Garnish with lettuce if desired. 6-8 servings.