1/4 c Plain Low Fat Yogurt 2 tb Low Cal. Mayonnaise 1/4 ts Onion Powder 4 sm Tomatoes, Halved Crosswise Lettuce Leaves 1 tb + 1 t. Black Caviar, Rinsed And Drained Combine Yogurt & Mayonnaise & Onion Powder in Small Bowl. Mix Well. Cover And Chill At Least One Hour. Arrange Tomato Halves On Lettuce Lined Plates And Top Each With 1 t. Yogurt Mixture & 1/2 t. Caviar. (Fat 1.7. Chol 15.)