Wash the lemon, tomato and herbs, peel the avocado, egg and onion.
Cut the egg, avocado and tomato into medium cubes. Cut the onion into thin feathers, chop the garlic finely.
Add tuna fillets and herbs to the chopped products. Add salt and a little sugar (if the tomato is sweet, then sugar is not required).Sprinkle the salad with lemon juice and season with oil. Pepper as desired.