Title: Balsamic sauce
 Categories: Italian, Sauces
      Yield: 4 Servings
 
      1 c  Balsamic vinegar
      4    Cl Garlic; sliced
      4 pn (2-inch) fresh rosemary
      2 tb Butter; optional
 
  Put all the ingredients except the butter into a saucepan and bring
  to a boil.  Reduce the heat and simmer until it is reduced by half,
  about 10 minutes. The sauce is ready when it coats the back of a
  spoon. Add the optional butter and stir well.