Maybe soak the almonds in the hot water for awhile prior to pureeing to make a smoother sauce? (hummusapien.com)
Remove some of the liquid and mix it with the peanut butter to make a smooth sauce. (fieryfoodscentral.com)
Place all the ingredients for the sauce in a blender or food processor and puree until smooth, adding some water, if necessary, to make a smooth sauce. (fieryfoodscentral.com)