
Combine and boil. Add all the ingredients in a medium saucepan over medium heat, then whisk until well combined. Bring mixture to a boil, stirring occasionally to prevent sticking.
Simmer. Reduce the heat to low and simmer for 20-25 minutes until sauce thickens. Stir occasionally to ensure nothing sticks to the pan.
Cool. Remove the sauce from the heat and allow to cool slightly before using.
Use or store. Use the sauce immediately, or transfer the cooled sauce to a lidded jar to store for later use. For the best flavor, refrigerate overnight.