How to Make It
Bring a pot of water to boil. Plunge the basil into the boiling water and blanch for 2 minutes. Drain the leaves and refresh under cold water. Let cool. Drain, then squeeze the leaves free of excess moisture.
Put all of the ingredients into a food processor and puree until smooth. Transfer to a bowl, cover, pressing a piece of plastic wrap against the surface, and set aside until needed.