Put potatoes in a microwave safe dish, cover and microwave on high for 8-10 minutes or until potatoes are done. Spray a LARGE non-stick skillet with a little cooking spray, add onions and saute until they begin to turn brown. Add pepper, cooked potatoes and tofu dogs (sliced). Cook until all is hot. Stuff into the pizza vegan bread (cut into halves) or the pitas. Serve with some ketchup, mustard or spaghetti sauce, if desired.