Makes approximately 10 rolls
Peel the cucumbers with a cheese slicer. Go round and round until you reach the core of the cucumber, creating a long “ribbon”. Roll the ribbons into loose rolls, and fill each of them with a crab claw and a few straws of leek julienne.
Garnish with dill and garlic. Fill a food syringe (or pastry bag) with a mixture of mayonnaise and mustard, and give each roll an injection of sauce.