The most popular BBQ restaurant in Eagle (a very high end suburb of Boise), The Bodacious Pig, has a sloppy Joe on their lunch menu. It is made from chopped BBQ beef and pork left over from the previous day. It is the single most popular item on their menu. If you want one for lunch, you either call and order it early after they open or take your chances (not good) they still have any when you get there. They use mirepoix and finely diced red and green bell peppers in the mix with their house BBQ sauce. It is absolute heaven on a bun. I make my own with the same vegetable mix, ground sirloin or rib steak and a good BBQ sauce. Not as good as The Pig's, but pretty damn tasty.