Kitchen tip: To make simple syrup, boil 1 cup sugar with 1 cup water in a small saucepan until sugar dissolves. Let cool, then refrigerate up to 2 months.
Kitchen tip: Make the slightly frozen peaches in advance. Arrange peeled peach wedges on a baking sheet in a single layer. Freeze, then put in a freezer bag. Store frozen until needed. Let stand for 15 minutes at room temperature before using.