Clean, wash and drain the white cabbage and celery. Cut cabbage into fine strips, celery into thin slices. Peel and halve onions and cut into half rings. Peel the grapefruits so that the white skin is completely removed. Remove the fillets with a sharp knife between the parting skins. Squeeze the juice out of the parting skins. Measure 100 ml of juice and mix with vinegar, 1-1 1/2 teaspoon salt and a little pepper. Stir in oil and mix the marinade with cabbage, celery and onions and knead with your hands for about 5 minutes. Cover and leave to stand for about 1 hour. Put the grapefruit fillets in a cool place
Clean lamb's lettuce, wash thoroughly and drain well. Coarsely chop the walnut kernels. Mix sour cream, some salt, pepper and sugar. Season the cabbage salad with salt and pepper, possibly pouring off some liquid so that the sauce does not become too liquid. Mix sour cream sauce into the salad and finally fold in lamb's lettuce, drained grapefruit fillets and 50 g walnut kernels. Arrange the salad in preserving jars and sprinkle with the remaining walnut kernels. Add the rest of the lettuce. Tastes good with Focaccia
Waiting time approx. 50 minutes