Season the beef

• Place the ground beef in a bowl and season with salt and black pepper.
• Mix gently without overworking the meat, then shape into even patties.

Preheat the grill

• Light the grill and brush the grates with vegetable oil.

Grill the patties

• Grill the patties over high heat, flipping once, until well browned.
• Top each patty with cheddar cheese and let it melt.

Toast the buns

• Place the buns cut-side down on the grill until lightly toasted.

Assemble the burgers

• Spread ketchup and mustard on the bun bases.
• Layer lettuce, tomato, onion, the cheesy patty and pickles.
• Close the burgers and serve immediately.