If you wanted to add more body and keep it low carb, you could add quinoa. If you're doing South Beach, and more concerned with low-glycemic, then brown rice or barley would work well.
I like stuffed peppers, but for some reason I don't remember to make them that often. I've got some red peppers in the fridge now, and I'm crock-potting a chicken today. I think I'll try a chicken version tonight. Should be interesting.
