Combine all ingredients in your blender, and process on high until completely smooth. (if you love garlic add it, if you don't feel free to leave it out)
If you have a high powered blender such as a Blendtec or Vitamix, refer to the manufactuer's directions for using it to heat a sauce/soup or transfer to a small pot and heat over low just before serving. You can add a little water to thin it out, if it's too thick after heating.