3/4-1 Cup Unsweetened, Non-Dairy Milk such as Oat or Almond Milk (divided)
(*you can substitute 1 tsp prepared stone ground or Dijon mustard in place of the cider vinegar and dry mustard)
Directions
Soak the cashew in water overnight or place it into a pot and cover with water. Bring the water to a boil and then turn off and let the cashew sit for 30 minutes. Drain the cashews.
In a high-speed blender, combine all of the ingredients including 1/2 cup of the milk; Puree until smooth and adjust the consistency with the remaining milk.
Store the sauce in the refrigerator. If reheating, you might have to add 1-2 Tbsp. of water or milk.