Cook the rice according to the instructions on the package
Remove the hard stem from the savoy cabbage leaves
Blanch them in salted water for 3-4 minutes (or in a steamer) and put them in cold water
Chop the shallots and fry them in olive oil until glassy
Chop the mushrooms and chestnuts and add to the shallots
Fry for another 5 minutes and then deglaze with the white wine
Let simmer for another 5 minutes
Add the rice - mix well and add the cream and season to taste with the spices
Add 1-2 Tbsp of the filling to a Savoy cabbage leave and roll them into packages
Cook in a steamer for 30 minutes or if you don't have one, you can cook them in a pan as well
Just add some oil to a pan and roast the packages for 3-5 minutes, than add ca. 300 ml water with bouillon
Let simmer for 20-25 min with a closed lid
If you prepare the rolls in a steamer you can also quickly roast them in some oil for some extra fine roast aromas - but it's optional