Wash and drain the salad. Halve the avocado and remove the core. Peel the avocado, cut into slices and sprinkle with lemon juice
Cut the salmon into cubes of about 1 cm. Peel and chop the onion. Mix vinegar, salt, pepper, sugar and diced onion. Fold in the oil. Distribute the salad on plates and cover with salmon cubes and avocado slices. Spread the vinaigrette over the salad.