For the vinaigrette, halve the limes and squeeze them. Mix lime juice, salt, pepper and 1 tsp. sugar. Fold in the oil.
Sort the rocket, wash, drain well and cut coarsely. Coarsely chop the peanuts. Wash the cucumber and cut off the ends. Cut 4 thin slices (3-4 mm thick) from the middle of the cucumber over the whole length of the cucumber for the salad rings.
Core the remaining cucumber with a spoon and dice finely. Wash apples, quarter them, cut out the core and finely dice the flesh. Mix rocket, peanuts, cucumber and apple cubes well with the vinaigrette.
Gently squeeze the mozzarella between two layers of kitchen paper. Coarsely grate the cheese. Put cucumber slices into rings, fasten with wooden skewers and place on plates. Distribute the salad in the cucumber rings. Sprinkle with mozzarella.
Baguette goes with it.