Preheat grill to medium high heat.
Heavily season burgers with salt and pepper. Grill for 4-5 minutes a side until nicely browned and grill marks arise. Top burgers with cheddar cheese and let melt.
Toast buns on grill for 1 minute a side.
To assemble place mayo on bottom bun then add stack onions, pickles, burger patty, tomato and lettuce. Spread ketchup on bun lid and place on top to finish.