In a large skillet coated with nonstick cooking spray, saute onion and garlic until softened. Add remaining ingredients; mix well. Cover and cook over medium heat for 5-7 minutes or until vegetables are tender. Yield: 6 servings. Diabetic Exchanges: One 1/2-cup serving equals 1 vegetable; also, 19 calories, 8 mg sodium, 0 cholesterol, 4 gm carbohydrate, 1 gm protein, trace fat.