Combine all ingredients in a large pot, cover and bring to a boil.
Remove lid and allow to cook over medium heat (a soft boil) until the sauce has thickened (approximately 30-40 minutes). Stir frequently to avoid burning.
That's it! You're done when it reaches the consistency you prefer. Store in canning jars or in the fridge.
Notes
Please note that the nutrition data below is a ballpark figure. Exact data is not possible. Data is for 1 entire jar. Divide that by the number of servings you use.