- Now take a cabbage leaf, open it up inside up. Cut out the base of the central rib. Place a good dollop of filling on the leaf, then fold the sides inwards on top of the filling, then starting at the base roll the leaf up to form a tidy package. 
- Repeat until you've stuffed and rolled all the cabbage leaves. 
- Place the rolls in a baking dish in which they can fit snugly together. 
- Melt the butter with the garlic and sage over gentle heat. Let them simmer together very slowly for a few minutes so the butter is infused with the aromatics. Take care that the butter doesn't brown at all.  
- Spoon the melted butter over the rolls. Then top with a generous dusting of grated cheese.  
- Bake the rolls in a hot (200C/400F) oven for 15-20 minutes, or until they are cooked through and golden brown on top. If need be, you can run them briefly under the broiler to brown.  
- Serve your involtini di verza while still warm but not scalding hot.