Roast the pine nuts in a pan without fat until golden brown. Mix vinegar, lime juice, salt, pepper and sugar. Fold in the oil. Spinach, lettuce
Wash, clean, halve or quarter the tomatoes. Pour mozzarella in a sieve and drain. Cut cress from the bed and stir into the vinaigrette. Mix spinach, lettuce, watercress, mozzarella and tomatoes, arrange on four plates.
Drizzle vinaigrette over it. Serve sprinkled with pine nuts.