Classic American Hamburger with Grilled Onions

Method

1. Preheat grill or skillet to medium-high heat.
2. Form ground beef into 2 patties and season with salt and pepper.
3. Grill patties for 4-5 minutes per side for medium doneness.
4. Cook onion slices on the grill until caramelized, about 5-7 minutes.
5. Toast buns and assemble with lettuce, tomato, patty, cheese, onions, ketchup, and mustard.
6. Check that the ground meat reaches 71°C (160°F) throughout before serving.