COOK nuts and sugar in nonstick skillet on medium heat 3 to 5 min. or until sugar is melted and nuts are evenly coated with glaze. Cool.
MEANWHILE, use small sharp knife to cut peels and white pith from fruit. Cut each piece of fruit crosswise into 8 slices. Alternately arrange fruit, with slices slightly overlapping, around edge of platter. Toss salad greens with onions; place in center of platter.
DRIZZLE salad with dressing just before serving. Break nuts into small pieces; sprinkle over salad.