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Wiktionary
pistou

n. A cold sauce made from cloves of garlic, fresh basil, and olive oil.

Wikipedia
Pistou

Pistou, or pistou sauce, is a Provençal cold sauce made from cloves of garlic, fresh basil, and olive oil. It is somewhat similar to pesto, although it lacks pine nuts. Some modern versions of the recipe include grated parmesan, pecorino or similar hard cheeses.

Usage examples of "pistou".

Serve soup in bowls and add dollop of basil pistou to taste in the center.