Cut onion, tomatoes, olives and pepper into slices.
Cut the celery into cubes.
Prepare the dressing: mix the oil, soy sauce and sweet (not spicy) mustard.
We collect the salad: we put the lettuce leaves on a plate.
Next - pepper, onion, olives and celery.
Put the tomatoes on top.
Pour our dressing and garnish with sesame seeds.
