Mmmpossible Cheeseburger Pie(Serves 6)  
["1 lb. ground beef", "1 1/2 c. chopped onions", "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 cheese or process American cheese"]
["Heat oven to 400\u00b0.", "Grease pie plate 10 x 1 1/2-inches.", "Cook and stir beef and onion in 10-inch skillet until beef is brown; drain.", "Stir in salt and pepper; spread in plate.", "Beat Bisquick, milk and eggs with wire whisk or hand beater until almost smooth, about 1 minute.", "Pour into plate.", "Bake for 25 minutes; top with tomatoes and cheese.", "Bake until knife inserted in center comes out clean, 5 to 8 minutes.", "Garnish with lettuce."]
["ground beef", "onions", "salt", "pepper", "Bisquick baking mix", "milk", "eggs", "tomatoes", "Cheddar cheese"]