Peel, wash and roughly grate the carrots and celery. Sprinkle with 4 tablespoons of lemon juice. Wash parsley, dab dry and remove leaves. Chop half of the leaves. Wash apple, quarter it, remove core.
Cut the flesh into slices. Sprinkle with remaining lemon juice. Cut the pineapple into small pieces. Chop walnuts. Mix vinegar, chopped parsley, salt and pepper. Whip oil into it.
Carrots, celery, pineapple. Mix walnuts and currants and arrange on plates. Pour some vinaigrette over the salad. Garnish with the remaining parsley and apple wedges. The rest of the extra vinaigrette is enough.
It goes well with brown bread.