Damn - Tasty, Sure Simple Rib Sauce

      3 tb Olive oil                         1/4 c  Tomato paste or ketchup
      4 ea Cloves garlic, minced               3 tb Dijon Mustard
    1/3 c  Brown sugar, packed                 2 tb Soy Sauce
    1/4 c  Cider vinegar                       1 tb Red pepper flakes
    2/3 c  Chicken stock

  Heat the oil in a small, heavy saucepan over medium heat.  Add garlic and
  saute until transparent, 2 to 3 minutes.  Do not allow the garlic to burn.
   Whisk in remaining ingredients, reduce heat to low; simmer 15 minutes to
  20 minutes, until the mixture thickens.  Stir occasionally.

  Source: The Great BBQ Companion, Mops, Sops, Sauces, and Rubs by Bruce
  Bjorkman.