1. Cut pear lengthwise into 1/4-inch slices, cutting from stem end through the bottom. Cut apples crosswise into 1/4-inch slices.
2. Stir together pear, apples, plums, and next 3 ingredients in a 3-qt. glass container until fruit is coated. Gradually stir in Chianti. Cover and chill 8 to 24 hours.
3. Stir in sparkling white wine just before serving. Serve over ice. Garnish, if desired.