Add raw cashews to a heat proof bowl and cover with just boiled water. Allow to soak for at least 30 minutes or up to overnight – until cashews look pale and plump.
Drain cashews and add to a high speed blender along with 1/3 cup + 2 tablespoons just boiled water, lemon juice, apple cider vinegar, salt, and garlic.
Blend on high until smooth and creamy, stopping to scrape down the sides as necessary. Taste and add a little more salt or apple cider vinegar / lemon juice as desired.