Rub cavity of each duck with 1 tsp salt. Combine celery, chopped apple, and onion; stuff into cavity of each duck. Close cavity with skewers. Brown ducks in shortening in a heavy Dutch oven; add water, orange juice, and 1/2 tsp salt.
Cover tightly; cook over low heat 45-60 minutes or until tender (time depends on age of duck). Baste 2-3 times during cooking. Garnish with parsley, grapes, and apple wedges.
Servings: 6