The pesto is an Italian sauce based on basil, garlic, cashews, parmesan and olive oil. He is from the Liguria region, in Italy, and it is widely used in Italian cuisine to accompany pasta, fish, meat and other dishes. The pesto is generally prepared using a mixer or a mortar to finely grind the basil leaves, garlic, cashews and parmesan. Olive oil is then added to give a creamy consistency to the sauce. The pesto can be used as is or diluted with water or milk to make it a more fluid sauce. Pesto is often used to accompany pasta, but it can also be used to marinate fish or meat, or to prepare sauces for grilled vegetables. It is also often used as a garnish for sandwiches and sandwiches.