Rinse shrimps cold in a sieve, drain and cut into small pieces. Clean, wash and finely dice the celery. Wash the dill, shake dry and chop the tips coarsely.
Peel and finely chop the garlic. Mix with mayonnaise, sour cream and lemon juice. Stir in prawns, celery and dill. Season to taste with salt and pepper. Fill into the shortbread bowls for serving.