ペスト(pesto)とは？英語で回答してください。
Pesto is a sauce that traditionally consists of crushed garlic, European pine nuts, coarse salt, basil leaves, and hard cheese such as Parmigiano-Reggiano(also known as Parmesan cheese)or Pecorino Sardo(cheese made from sheep's milk), all blended with olive oil. It originated in Genoa, the capital city of Liguria, Italy.