Preheat oven to 400. Peel, thinly slice and cook the potatoes and thinly slice the peppers.Spray or grease pizza pan (deep Dished) and Mix the 3/4 cup barbecue sauce with the cooked and drained beef. Spread beef mix over the top of the crust and top with green peppers and the potatoes. Drizzle the 1/4 cup barbecue sauce over this and sprinkle with cheese. Bake until cheese is melted through and the crust is lightly browned (about 10-15 minutes).