Ground beef
Chopped onion
Salt
Pepper
Ketchup
Buns or English muffins
Cheese, if desired

Mix together ground beef, onion, salt, pepper and ketchup to make a nice spreading consistency. Season to taste. Spread mixture thinly over 1/2 hamburger bun or English muffin. Be sure to spread right up to edge of bun. Place low in broiler. Broil 3-5 minutes, until hamburger mixture is done. Add cheese. Melt. Serve warm.