COMBINE VINEGAR, WATER, sugar and mustard in 1-quart pan. Place over medium heat and bring to boil. Cook until liquid becomes syrupy. Add papayas and curry powder. Cook 2 minutes more, stirring constantly. Remove from heat and mix in onion. Pack mixture into jar and refrigerate 1 week before using. Makes 1 Quart MICHAEL ROBERTS PRODIGY GUEST CHEFS COOKBOOK