Grate the white cabbage finely and knead it with a little salt (it is best to use your hands, this makes the cabbage softer and more digestible). Grate the apple, chop the parsley and chives. Mix all ingredients in a large bowl and let stand overnight, seasoning to taste if necessary.
Note: this is a very cheap salad. With a white cabbage you get a small bucket of lettuce, which can be kept for a week if well chilled and which tastes better the longer it steeps.