Filling for a Pork Roll?

[Matthew.Taylor]

Ok, I have a leftover pork shoulder in our deep freeze, and I want to do something with it this summer. 
 

I was thinking slice it flat, put in a filling, roll it up, tie it up, and slow grill it. It’s just that I need a good filling for it. Anyone have any ideas?

[pastrygirl]

Italian porchetta - usually involves pork belly but here's a butt/shoulder version:  https://www.foodnetwork.com/recipes/roasted-porchetta-recipe-2109840