re: I need help with pork loin stuffings

Just a suggestion, have you thought of doing two other things instead:

First, try getting a slab of pork belly and do a porchetta. Can send you a recipe if you want it. Results will be much better.

Second, consider butterflying the loin, laying it flat like a book and smear it with a fragrant herb paste. Tie it back up and roast it or grill it.

I think both will give you better flavor, especially the porchetta, with same amount of work.