Method:

• 1

  Place the ground beef in a bowl, season it with a pinch of salt and pepper, and mix. Shape the hamburgers using a ring mould, flattening them well. Wash, dry and slice the tomato, discarding the ends. Drain the gherkins and cut them into slices.

• 2

  Peel, rinse and cut the onion into fairly thick slices. Fry it in a pan with some olive oil and a pinch of salt until golden.

• 3

  Toast the inside of the 4 buns on a hot griddle until golden. Sprinkle the griddle with a little salt and cook the hamburgers for approx. 3 minutes per side. Spread the mayonnaise on the buns (season with Tabasco sauce, if desired), add the meat and top with 1 slice of tomato, the gherkins, lettuce and onion.

• 4

  Fry the egg with a pinch of salt and place one in each bun. Place the other half of the bun on top and serve.