pistou

French, from Late Latin pistāre (“to crush”).

pistou (uncountable)

1. A cold sauce made from cloves of garlic, fresh basil, and olive oil.
   • 2007 January 28, Christine Muhlke, “Bistronomy”, in New York Times‎:

     On a November morning, the other side of the 12-foot-long cooking area featured metal organizers filled with endive, bread crumbs, almond butter, mushrooms, shallots, chorizo, chives, purée of purple potatoes, parsley pistou, chestnuts, dried tomatoes and other items that allow the chef to riff at high speed.

• persillade
• pesto

• putois