Heat oil in a large pot. Sauté onions for 5 minutes or so. Add peppers and shoyu. Continue to sauté until vegetables are tender, about another 5 to 7 minutes. Place in a serving bowl.
Use for burritos, tacos, tortillas and botana, or simply as a side dish.
Per serving - 39 calories, 2 gram fat (41% calories from fat), 1 gram protein, 5 gram carbohydrate, 1 gram fiber, 0 milligram cholesterol, 43 milligram sodium