Making Russian Vanilla Kissel is a straightforward process. Follow these steps for a perfect dessert every time:

1. Prepare the Vanilla:
   • If using a vanilla bean, slice it lengthwise and scrape out the seeds. Combine the seeds and the pod with the milk in a medium saucepan.
   • If using vanilla extract, you can add it later in the process.
2. Heat the Milk:
   • Place the saucepan over medium heat and slowly bring the milk to a simmer. Stir occasionally to prevent the milk from scorching.
3. Mix Sugar and Cornstarch:
   • In a separate bowl, whisk together the granulated sugar, cornstarch, and a pinch of salt. Ensure there are no lumps.
4. Combine Mixtures:
   • Gradually add the sugar-cornstarch mixture to the simmering milk, whisking constantly to avoid clumps.
5. Thicken the Kissel:
   • Continue to cook, stirring continuously, until the mixture thickens to a pudding-like consistency. This should take about 5-7 minutes.
6. Add Vanilla Extract:
   • If you are using vanilla extract, remove the saucepan from heat and stir it in at this point.
7. Remove Vanilla Bean:
   • If you used a vanilla bean, remove the pod from the Kissel.
8. Cool and Serve:
   • Pour the Kissel into individual serving dishes. You can enjoy it warm or allow it to cool to room temperature before refrigerating it for a chilled dessert.