Place raisins in a bowl and cover with water. Let sit for 8 hours, or overnight.
Add the raisins and water to a blender, and blend until smooth, about 20-30 seconds.
Pour the finished sauce into a glass jar. Use immediately or store in the fridge for up to 10 days.
Notes
Substitutions and add-ins
Substitute all or part of the raisins for dried dates, apricots, prunes, figs, currents, cherries, or cranberries.Add in a small amount of fresh ginger, dried ginger, cinnamon, cardamom, all-spice, clove, or nutmeg.Try a squeeze of lemon or lime to enhance the sour taste.Try a pinch of salt to enhance the overall flavor and add minerals.Ref: https://kripalu.org/resources/kripalu-recipe-raisin-sauce