Heat the oils in a large, heavy skillet. Add the tempeh, brown one side, flip over and brown the other side. Combine mustard, water and shoyu. Mix and pour over the tempeh. Cover, bring to a boil, reduce heat to medium low and simmer about 7 to 10 minutes. Remove the lid, turn heat to high and cook off remaining liquid. Place equal portions of tempeh, lettuce, tomato and sauerkraut on each slice of bread and serve.
Per serving - 364 calories, 17 gram fat (39% calories from fat), 24 gram protein, 34 gram carbohydrate, 3 gram fiber, 0 milligram cholesterol, 807 milligram sodium