Bisquick Cheeseburger Pie - 1 lb ground beef, 1 onion, chopped, 1/2 tsp salt, 1 c shredded cheddar, 1/2 c Bisquick mix, 1 c milk, 2 eggs. Heat oven to 400. Cook beef and onion until browned, drain. Add salt. Spread beef in pie plate and sprinkle cheese on top. In a bowl, mix remaining ingredients with a fork or whisk until well blended. Pour mixture over beef & cheese. Bake for 25 minutes.