If you’re using the sauce right away, transfer it to a clean jar and let cool before sealing; the sauce will keep refrigerated for two weeks. Or, if you want to make this as a gift or stock the pantry, transfer the sauce to a clean jar, cover with a lid and place in a water bath of boiling water, submerging 3/4 of the jar. Cook for 20 minutes, remove the jar from the water bath and then tightly twist it closed. As the sauce cools, the jar should seal itself and make a popping sound. If the jar does not seal, store in the refrigerator.