How to Make It
Bring first 3 ingredients to a boil in a saucepan. Reduce heat to medium; cook until syrupy and reduced to about 1 cup, 12 to 15 minutes.
Split vanilla pod in half lengthwise; scrape seeds into wine mixture. Add pod to mixture. Stir in berries. Reduce heat to low; cook 2 minutes (mixture will not come to a simmer).Remove from heat; pour mixture into a bowl to cool completely. Discard vanilla pod and thyme sprigs; garnish with thyme leaves, if desired.