Cabbage Rolls with pork

1 head cabbage , center core removed 2 -3 tablespoons butter 1 cup chopped onion 1 lb ground beef 1 lb ground pork 1 lb ground veal 2 cups cooked white rice 1[...]

for the cabbage rolls 2 large heads savoy cabbage 5 tbsp/70 g unsalted butter 1/4 cup/40 g coarsely chopped onion 4 cups/630 g cooked white rice 1 lb/455 g[...]

12 cabbage leaves 1 (6 ounce) box seasoned stuffing mix 1 -2 stalk celery 1/2 onion 1 apple 8 (10 ounce) bags walnuts water salt 1 I am using leftover Stove[...]