Good advice Gary...but, as any good chef will tell you, and this would apply to basically every type of prepared food, any time span, especially an acidic sauce, should always be kept hot or cold. Never left at roon temp. after ten to 12 hrs. Enzymes in the ingredients will start to break down, causing anything from simple bacteria, up to and including, Trichinosis and/or Botulism, etc. It sounds like to me, that your sauce did not remain in the TDZ (Temperature Danger Zone) for that long of a time. Still, I would bring the sauce back up to an internal temp. of 165-F to 212-F, which should kill most of the bacteria that could cause food-borne illnesses. SAFE & HAPPY COOKING !!! -Marko