Slice avocado into 8 wedges. Arrange equal amounts of avocado and grapefruit on 4 salad dishes and top each with 2 onio slices. Dress each salad with 1 tablespoon sauce. Food Exchanges per serving: 1 FRUIT EXCHANGE + 1 FAT EXCHANGE; CAL: 137, CHO: 0mg; CAR: 3g; PRO: 17mg; SOD: 109; FAT: 10g;