Preparation Bring first 5 ingredients to simmer in heavy medium saucepan, stirring to dissolve sugar. Remove from heat. Scrape seeds from vanilla bean into syrup. Return bean to syrup. Cover and continue simmering 5 minutes. Add peaches and poach until just tender when pierced with tip of sharp knife, about 4 minutes. Transfer mixture to bowl and refrigerate until cold, at least 3 hours. (Can be prepared 3 days ahead.) Remove vanilla bean and any loose pieces of peach skin before serving.
Preparation Bring first 5 ingredients to simmer in heavy medium saucepan, stirring to dissolve sugar. Remove from heat. Scrape seeds from vanilla bean into syrup. Return bean to syrup. Cover and continue simmering 5 minutes. Add peaches and poach until just tender when pierced with tip of sharp knife, about 4 minutes. Transfer mixture to bowl and refrigerate until cold, at least 3 hours. (Can be prepared 3 days ahead.) Remove vanilla bean and any loose pieces of peach skin before serving.