EASY CHEESEBURGER QUICHE 1 lb. ground beef 1/2 c. chopped onion 1/2 tsp. salt 1/4 tsp. pepper 1 c. shredded Cheddar cheese 1 1/2 c. milk 3/4 c. Bisquick baking mix 3 eggs 9x13 inch dish, greased Cook beef and onion; drain. Stir in salt and pepper. Spread beef mixture in pan. Sprinkle evenly with cheese. Beat milk, Bisquick and eggs until smooth. Pour evenly into pan. Bake 30 minutes at 400 degrees.