Wash lemon, tomato and greens, avocado, egg and onion.
Cut the egg, avocado and tomato into medium cubes. Onions cut into thin feathers, garlic finely chop.
Add to chopped foods tuna fillet and greens. Season with salt and lightly sugar (if the tomato is sweet, no sugar is required).Sprinkle the salad with lemon juice and season with oil. Pepper if desired.