Impossible Cheeseburger Pie

From Bisquick

1 lb. ground beef

1 C chopped onion

½ tsp salt

1 C shredded Cheddar cheese

½ C Bisquick

1 C milk

2 eggs

Cook ground beef and onion until beef is brown; drain.  Stir in salt.  Spread in greased 9” pie plate; sprinkle with cheese.  Stir remaining ingredients until blended.  Pour onto pie plate.  Bake at 400° for 25 min. or until knife inserted in center comes out clean.