Combine the meat, bread crumbs, barbecue sauce, egg and salt, blending well. Pat the meat mixture into a 14 X 8-inch rectangle on foil or waxed paper. Combine the cheddar cheese, bread crumbs, green pepper and water and pat the cheese mixture over the meat mixture. Roll up roll fashion, starting at the narrow end. Chill for several hours or overnight. Slice into 6 servings and bake in a shallow casserole in a preheated 350 degree F. oven for 25 to 30 minutes. Serve hot.