Clean and wash the cabbage and cut into fine strips. Peel onions and cut into fine cubes. Heat oil in a pan. Fry onions and cabbage for about 1 minute. Take them out. Add mustard, vinegar, stock and sugar, mix well and set aside. In the meantime, clean and wash the celery and cut it into fine pieces.
Wash the cucumber, rub dry and cut into strips around the core with a peeler. Wash dill, dab dry, pluck flags from the stems and chop finely. Add celery, cucumber, dill and crabs to the cabbage and mix everything. Season with salt and pepper. Spread slices of bread thinly with cream cheese. Arrange salad on top. Garnish with lime