Rinse the chickpeas in a sieve and drain. Peel onions and cut them into fine rings. Wash and halve the tomatoes. Drain mozzarella and cut into slices.
For the vinaigrette, wash the chives, shake dry and cut into fine rolls. Mix lemon juice, vinegar, salt, pepper, approx. 1/2 tsp. sugar and pesto. Fold in the oil. Stir in chives.
Mix chickpeas, onions, tomatoes and vinaigrette. Serve with the mozzarella. Flatbread tastes good with it.