Start by chopping the lettuce leaves into strips.
Cut the cucumbers into round slices and set aside.
Cut the boiled eggs also into round slices, cut the tomatoes into wedges. Crush the tuna and set aside.
Into a bowl, add the olive oil, the apple vinegar, the soy sauce, the black pepper, the salt, mix all the ingredients very well.
On a large plate, spread the chopped lettuce leaves, make 2 rows with the tomato wedges. Make 2 rows with the egg slices.
Add the cucumbers and place the tuna in the center of the dish.
Drizzle the salad dressing we made all over it.
Serve.