INGREDIENTS
1 lb
ground beef
2 tbsp
finely chopped onion
2 tbsp
chili sauce
2 tsp
Worcestershire sauce
2 tsp
prepared mustard
4
slices process American cheese or cheddar cheese, halved diagonally
2
slices Swiss cheese, halved diagonally
4
hamburger buns, split and toasted
Lettuce leaves, sliced tomato and onion, cooked bacon strips, ketchup and mustard, optional