Tips to elevate my stuffed peppers?

Need a bit of advice to give some oomph to my stuffed pepper recipe that I’m trying to develop here. Also trying to keep it healthy. I grilled some pineapple, and sautéed red onion, white onion, orange pepper, shallot and garlic in some oil until transparent. Everything chopped fine then into a bowl with a bunch of pepitas. Then I browned a package of 90/10 ground beef and added that in to the whole mix. Salt and cumin (will toast the cumin next time) to taste. Then I halved the Jalapeños, oiled them, added the mixture, and grilled until they started to get a nice char. I stuffed the rest into a sweet orange pepper and grilled just to experiment. It was pretty good but I just wanted some feedback on ways to improve? Ive thought about brown rice, quinoa, tomato sauce (too sweet on top of pineapple?), and maybe adding some better than bullion into the mix for next time. Any other ideas?