This is a great and easy recipe. Use a sheet of aluminum foil about 2 feet long. Drain sauerkraut and form oblong in center of foil. Place kielbasa on top of sauerkraut. Sprinkle black pepper to taste. Cover with thinly sliced onions and wrap with aluminum foil. Cook in over at 350 for approx. one hour or for best results, cook on grill for about an hour.