Combine first 4 ingredients in a large, shallow nonmetal bowl. Combine vinegar and next 4 ingredients; pour over vegetables. Cover and marinate in refrigerator 2 hours. Combine tomato mixture and lettuce in a bowl; toss.

Per serving: 35 Calories; 2g Fat (45% calories from fat); 1g Protein; 4g Carbohydrate; 0mg Cholesterol; 92mg Sodium