Impossible Cheeseburger Pie
["1 lb. ground beef", "1 1/2 c. chopped onion", "1/2 tsp. salt", "1/4 tsp. pepper", "1 1/2 c. milk", "3/4 c. Bisquick baking mix", "3 eggs", "2 tomatoes, sliced", "1 c. shredded Cheddar or process American cheese"]
["Heat oven to 400\u00b0.", "Grease pie plate (10 x 1 1/2-inches). Brown beef and onion; drain.", "Stir in salt and pepper.", "Spread in plate.", "Beat milk, baking mix and eggs until smooth, 15 seconds in blender on high or 1 minute with hand mixer.", "Pour over plate. Bake 25 minutes.", "Top with tomatoes, sprinkle with cheese.", "Bake until knife inserted in center comes out clean, 5 to 8 minutes. Cool 5 minutes.", "Makes 6 to 8 servings."]
["ground beef", "onion", "salt", "pepper", "milk", "Bisquick baking mix", "eggs", "tomatoes", "American cheese"]