Heat oil in a medium skillet and sauté onions for 2 to 3 minutes. Add all remaining ingredients and bring to a boil. Reduce flame to medium-low and simmer 5 to 7 minutes. Serve hot or chilled.
Per serving - 162 calories, 2 gram fat (12% calories from fat), 7 gram protein, 28 gram carbohydrate, 7 gram fiber, 0 milligram cholesterol, 158 milligram sodium