Clean, wash and drain the lamb's lettuce. Peel the shallots and cut into thin rings. Drain the mozzarella. Cut pomegranates in half and remove the seeds.
For the vinaigrette, mix vinegar with salt, pepper and 1/2 teaspoon sugar, fold in olive oil. Wash basil, shake dry, pluck off leaves, chop coarsely and add to the vinaigrette. Puree briefly with a hand blender.
Mix lamb's lettuce, shallots, mozzarella, pomegranate seeds and vinaigrette and serve.