1. In a large saucepan, saute leeks in butter until tender. Stir in flour until blended. Gradually add the broth, water, parsley, herbes de Provence, chives, celery seed and nutmeg. Bring to a boil; cook and stir for 2 minutes or until thickened.
2. Cut tips off asparagus and set aside. Cut stalks into 1/2-in. pieces; add to pan. Reduce heat; cover and simmer for 10-15 minutes or until asparagus is tender. Cool slightly.
3. In a blender, process soup in batches until smooth. Return all to pan. Stir in potatoes. Bring to a boil. Reduce heat; cover and simmer for 10 minutes. Stir in asparagus tips; cover and simmer 5-8 minutes longer or until vegetables are tender. Stir in ham and cream; heat through. Sprinkle with cheese. Yield: 9 servings (2-1/4 quarts).