Prepare the buns

• Cut the burger buns in half.
• Remove some of the inside of the buns to make room for the filling.
• Place the bun halves in a loaf pan.

Cook the beef and onion

• Heat the oil in a frying pan.
• Cook the ground beef with the chopped onion until browned and cooked through.
• Season with salt.

Assemble the bake

• Add a layer of cheese slices over the buns in the pan.
• Fill with the cooked ground beef and onion.
• Top with the shredded cheese.

Broil

• Broil until the cheese is melted and golden.