Combine the cranberry sauce, apple cider vinegar, olive oil, mustard, salt, and water in a blender and blend until smooth.
Taste the dressing and extra salt if needed. If you prefer a thinner consistency, add one to two more tablespoons of water.
Store extra dressing in a covered jar in the refrigerator for about 2 weeks.
Notes
This homemade dressing is a perfect way to use leftover cranberry sauce.If you prefer a sweeter dressing, add maple syrup, one to two teaspoons at a time, until the dressing is sweet enough.If you prefer a tangier dressing, add an extra tablespoon of apple cider vinegar.This recipe makes about 2/3 cup of salad dressing