Slice the onion into rings and the tomato. Lightly brown the onions in a frying pan with oil. Set aside.
Slice the bun into 3 slices and toast them on a (grill)pan
Cook Garden Gourmet’s Sensational Burgers in a frying pan according to the instructions on the package and while still hot place slices of cheese on them so they melt.
Spread mayonnaise on the bun bases. Place the lettuce, the tomato, a burger patty, some pickle slices and ketchup. Place the middle bread slice, spread mayonaise on it and top with lettuce, fried onion and ketchup. Put the second burger patty on it, the tomato, more pickles, mayonnaise and ketchup. Top with the bun lid.