Durkee's Famous Sauce

   1/2  cup                 Cold water
   4      tablespoons   Cornstarch
   1/2  cup                 Plus 2 TB dark vinegar
   2      tablespoons   salt
   1/2  cup                  sugar
   1      Whole             egg
   4      tablespoons   French's prepared mustard
   4      tablespoons   Margarine -- tiny bits

Place all ingredients as listed in blender on high speed until smooth (2
minutes). Transfer to top of double boiler and cook over gently boiling
water, stirring often for 12 to 15 minutes or until thickened and smooth.
Once more put mixture back through blender 30 seconds or till smooth,
using high speed. Refrigerate in covered container 24 hours before using.
Keep refrigerated  3 months.