Cut the bulb into half-circles. Pour vinegar, diluted in half with boiled water. Leave for half an hour.
Tune a tuna by a fork, cut olives in circles and cucumbers in thin slices.
Boil the eggs abruptly. Stir the protein with a straw, and crush the yolk.
Cut cherry tomatoes by quarter.
Combine all products, salt, add pepper. Stir, sprinkle with olive oil.