Whisk together 1 cup water and cornstarch in a small saucepan. Whisk in sugar, rind, and juice. Bring to a boil over low heat, whisking constantly; boil 1 minute. Chill at least 2 hours.
Combine pineapple and next 3 ingredients in a large bowl; garnish, if desired, and drizzle with chilled syrup. Serve immediately.