Lay the cabbage upside down and remove its core. Then carefully remove the leaves and boil them in water for 2-3 minutes. Drain them and leave them to cool.
PREPARE THE FILLING
Heat some EVOO in a pan, add the chopped onions and minced garlic and cook for 3 minutes. Add the sage leaves.
Add the pork mince and brown it until evenly cooked through, add 1 tsp salt. Put the meat in a food processor and mince it for a few pulse only.
Add the egg, parmesan, some breadcrumbs, the remaining salt, 1 tsp crushed black pepper and parsley. Mix until everything is evenly mixed.
MAKE THE ROLLS
Now take a sheet of cabbage, place it seam-side in, remove or smooth out the stem end and place 1/3 cup of the filling in the center.
Roll up the side closest to you, then wrap and roll up the outer sides.
Place the rolls, seam side down, in a baking dish that you've buttered ahead of time.
BAKE THE STUFFED ROLLS
Once all the rolls are in the pan, sprinkle them with 2 tbsp breadcrumbs and 2 tbsp parmesan.
Bake in a the oven at 360°F (180°C) for 30 minutes, until the top is golden.