Put all the ingredients in a large sauce pan, turn the heat on to medium, and give everything a few good stirs.
Bring the mixture up to a gentle boil for about two minutes. (This should take somewhere between 5 to 10 minutes depending on the temperature of your ingredients, the type of pot you have, and how hot your medium is.)
Turn heat to low and simmer for 30 minutes uncovered, stirring occasionally, until the sauce is reduced by about a third.
If you can scrape solids off the bottom of your pot, the heat's too high, and you should turn it down just a little.
Let the sauce cool and then put it in a lidded container and refrigerate between uses.
That's it. Enjoy!
