Combine 1/2 cup of rice vinegar, 1/4 cup of water, 1/2 cup of granulated sugar, 1 tablespoon of sambal oelek chili paste, 1/2 teaspoon of ground ginger, 1/2 teaspoon of chili flakes, 2 teaspoons of minced garlic and 2 teaspoons of soy sauce into a small saucepan and place over medium high heat
While the sauce is warming, combine the remaining 1/4 cup of water and 1 tablespoon of cornstarch and set aside
Once the sauce begins to steam, stir constantly until the sauce comes to a boil and the sugar dissolves
Once the sugar is fully dissolved, add the cornstarch mixture and continue to stir constantly over medium high heat for an additional 60-90 seconds
Once the sauce thickens, remove from heat and transfer into a glass bowl
Allow the sauce to cool to room temperature
Store in an airtight container in the refrigerator for up to a week