Kyndra Holley, who writes the Peace, Love and Low Carb blog, has recipes for at least half a dozen kinds of stuffed peppers. It seems like she takes recipes that need to be held in something (like tacos, or pizza) and uses the pepper shells to hold them. A great idea! I can get big peppers for 50 cents during the summer at the Farmers Market, which would be the time to try them.
And I thought I saw a recipe for Taco Stuffed Peppers, but maybe that was someone else using the same idea.
I haven't tried any of these, but it sounds like a way to sort of fancy up a meal and make the meat go farther, especially if you grow your own peppers or have access to cheap ones at the Farmers Market.