Prepare rice in boiling salted water according to package instructions. Wash the savoy cabbage leaves and cut the panicles flat. Blanch in boiling salted water for about 3 minutes. Mix rice and 1 teaspoon of cheese.
Cover cabbage leaves with 2 slices of pork loin and half of rice. Wrap into roulades and pin them with wooden skewers. Heat oil in a pan. Fry the roulades on all sides for about 6 minutes, turning them over.
Peel onion and cut into rings. Remove the roulades from the pan and wrap in aluminium foil. Fry the onion rings for approx. 3 minutes while turning. Remove the onion and dissolve the roast with stock.
Stir 1 teaspoon of cream cheese in the stock until smooth. Arrange roulades with onion and sauce on plates.