Cheeseburger Pie
["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\u00b0.", "Grease 10 x 1 1/2-inch pie plate.", "Cook and stir beef and onion in 10-inch skillet until beef is brown; drain.", "Stir in salt and pepper.", "Spread in plate."]
["ground beef", "onion", "salt", "pepper", "Bisquick baking mix", "milk", "eggs", "tomatoes", "American cheese"]