Cheeseburger Pie

1 lb hamburger
1 tbsp minced onion
½ tsp salt
½ tsp pepper
1 c milk
¾ c Bisquick
3 eggs
1 c shredded cheddar cheese

Grease 10-inch deep pie plate. Cook hamburger and onion. Add salt and pepper. Place hamburger in bottom of plate, sprinkle cheese over hamburger. Mix milk, Bisquick and eggs, pour over hamburger. Bake at 400 degrees for 30 minutes.