Cut cantaloupe into chunks. Halve and seed grapes. Trim asparagus, boil, steam or microwave until just tender. Cut asparagus into 5 cm lenghts. Combine broth, wine and garlic in a pan, add chicken; bring to a boil, reduce heat and simmer for 5 minutes on each side, or until tender. Drain chicken, cool, and shred finely. Combine chicken, melon, grapes, asparagus and capers with dressing. Serve with parmesan cheese. Dressing: Combine all ingredients in a jar, shake well.