Heat oven to 375 degrees. Combine the sauerkraut, soup and pepper in an oven proof dish and stir to mix well. Press frankfurters into the kraut mixture and spoon a bit of the kraut mixture over the frankfurters. Bake for 20 minutes or until mixture begins to bubble. Two minutes before serving, open buns and put on oven rack to heat through. Transfer a hot dog to each bun and mound kraut mixture on top.