Peel the onion and cut into short strips. Wash lemon hot, grate dry, grate peel thinly, cut fruit in half and squeeze juice from one half. Mix lemon juice, lemon peel and onion, season with salt and pepper.
Clean, wash and shake the salad dry and cut into short strips. Wash coriander, shake dry, cut leaves from the stems and chop coarsely. Halve the avocado, remove the core, remove the flesh from the peel and dice the flesh.
Carefully mix the salad ingredients and serve. Roasted bread tastes good with it.