Remove the outer leaves from the savoy cabbage and cut the rest into small pieces. Peel and dice the onions and garlic and sauté in a little fat. Add the savoy cabbage and sauté briefly. Deglaze with vegetable stock and simmer for 10 minutes.
Then add the condensed milk, salt, pepper and nutmeg and simmer on a low flame for about 20 minutes. Add the cream and thicken with a sauce thickener. Season again with salt, pepper and nutmeg.