Preheat oven to 200 °C.
Bubble cabbage in salted water for about 2 min, cool in a colander and drain well.
Mix cabbage with onion, potatoes and 2/3 of the parsley.
Mix yolks with Parmesan and whipped cream, season with pepper, nutmeg, salt and caraway and stir into the cabbage mixture.
Whip the egg whites with 1 pinch of salt until stiff and carefully fold into the casserole mixture.
Pour the mixture into a shallow ovenproof dish and bake at 200 °C in the middle of the oven for about 45 minutes, until the casserole is nicely browned and the potatoes are soft.
Sprinkle with remaining parsley and bring to table.
Carbohydrates, 8 g of fiber
served with: mixed leaf salad