Membrillo (Quince Paste) Viniagrette

===== Ingredients =====
  * 4 oz membrillo (quince paste)
  * 1 oz Dijon mustard
  * 4 oz white balsamic vinegar
  * pinch of salt
  * 8 oz olive or canola oil

===== Process =====

  - Combine membrillo, Dijon mustard, white balsamic vinegar, and salt in a blender or food processor.  Blend at low speed to start and then work up to medium speed within 60 seconds
  - With the blender running at medium-high speed, pour the oil in an even stream to emulsify
  - Add water, a little bit at a time, if the dressing is turning out too thick

===== Notes =====

Good!  As written, makes a lot.  But keeps well on the counter.