Impossible Cheeseburger Pie
["1 lb. ground beef", "1 1/2 c. chopped onion", "1/2 tsp. salt", "1/4 tsp. pepper", "1 c. shredded cheese", "1 1/2 c. milk", "3/4 c. Bisquick baking mix", "3 eggs"]
["Heat oven to 400\u00b0.", "Grease pie plate.", "Cook beef and onion until beef is brown; drain.", "Stir in salt and pepper.", "Spread in pie plate.", "Sprinkle with cheese.", "Beat remaining ingredients until smooth; pour over pie plate.", "Bake for about 30 minutes. Let stand 5 minutes before cutting."]
["ground beef", "onion", "salt", "pepper", "shredded cheese", "milk", "Bisquick baking mix", "eggs"]