Arrange tomato slices on salad plates. Layer a few Onion rings on top of tomatoes. Sprinkle with basil or parsley and dash of pepper. Mix lemon juice with oil and spoon each seving. Food exchanges per serving: 1 vegetable exchange + 1 fat exchange; calories: 66; cho: 0 mg; car: 9g; pro: 2g; sod: 15 mg; fat: 4g;