I would try something with the flavors of that Thai stir fry with holy basil.
Soy, palm sugar, garlic, fish sauce, fresh chile paste, thai or holy basil with pork as your filling. I like the way all those flavors play with the bitterness of bell peppers. Then once they're finished, hard fry an egg and throw one on top of your stuffed pepper.
I would try rice in the stuffing, or to accompany your stuffed pepper. That's a whole meal, right there.