Sesame seed milk is a delicious way to prepare horchata using sesame seeds.
Heat up a large pan over medium heat. Add the sesame seeds and toast for about 5 minutes while stirring almost constantly.
Immediately transfer the seeds to a large bowl. Break the cinnamon stick into pieces and add it to the bowl along with 6 cups of water. Let the seeds soak for about 3 hours.
Do this next step in 2 batches. Transfer the sesame seeds, cinnamon and water to a blender. Add 2 more cups of water to the blender and blend until smooth.
Strain the blended sesame mixture into a pitcher using a fine mesh strainer. Use the back of a spoon to press the liquid through the strainer.
Stir in the sweetened condensed milk, vanilla extract and the remaining water.
Serve the sesame milk over ice and refrigerate any leftover.