COOK IT.
To make the sauce, place the ketchup, mayonnaise and yellow mustard in a bowl and mix together thoroughly. Set aside.
Rub each burger with a little oil and cook them on the grill, flipping every 15-20 seconds until cooked through. Immediately after the last flip, place a cheese slice on top of each burger and allow to melt for the final 15 seconds.
Place the burgers on a cooling rack on top of a tray and allow to rest. Place the pickles, cut-side down, on the grill for about 90 seconds or until well charred.
To serve, place a burger topped with melted cheese on the bottom half of each bun. Add slices of tomato and onions, followed by lettuce leaves, 2 pickle halves and a little sauce. Cover with the top half of the bun.
