Pesto

Pesto is a tasty Italian paste from the city of Genoa in Liguria. It is made with fresh Genovese basil leaves, extra virgin olive oil, Parmesan or Grana Padano cheese, pecorino sardo cheese, pine nuts, and a bit of garlic. All these ingredients are mixed together to make a green sauce that is very popular in Italy.

Traditionally, pesto is made in a special tool called a mortar and pestle, which crushes the ingredients into a smooth paste. This way of making pesto has been used for a long time and is a key part of Italian cooking. The sauce is most often used to add flavor to pasta, but it can also be enjoyed with other dishes.

Pesto gives a bright, herby taste to meals and is loved for its fresh and simple ingredients. It is a wonderful example of how a few basic things can come together to make something delicious.

Etymology

The word pesto comes from an old language. It is the past form of a verb in the Genoese language that means "to pound" or "to crush". This is because the ingredients for pesto are crushed or ground in a special stone bowl using a wooden tool. The same root of this word is used in the Latin language for the word "pestle". When we say "pesto", we usually mean pesto alla genovese.

History

Pesto has very old roots, going back to the Roman age. The ancient Romans made a paste called moretum. They mixed garlic, salt, cheese, herbs, olive oil, vinegar, and sometimes pine nuts. Old poems described this sauce.

During the Middle Ages, people in Genoa liked a sauce called agliata. They made it from garlic and walnuts. Basil, the main ingredient in modern pesto, was first added in the 1850s. Recipes from that time used basil, garlic, cheese, pine nuts, and olive oil.

Pesto became well-known in the Liguria region of Italy. Later, it spread to other places. It became popular in North America in the 1980s and 1990s.

Ingredients and preparation

Pesto is made by mixing ingredients in a special way. First, garlic and pine nuts are mixed until smooth. Then, dried basil leaves, salt, and cheese are added. Finally, olive oil is poured in to help everything blend well. When stored in a jar with olive oil on top, pesto can stay fresh in the fridge for about a week or be frozen for later use.

There are many types of pesto. The classic kind, called pesto alla genovese, uses Genovese basil, salt, garlic, special olive oil from Liguria, pine nuts, and grated cheese like Parmesan or Grana Padano. Some people are working to get this special pesto recognized by UNESCO.

In Provence, a similar sauce called pistou is made with olive oil, basil, and garlic, sometimes without cheese. It can also include almonds or breadcrumbs and is often used in vegetable soups.

Outside of Italy, people sometimes use different nuts like almonds or peanuts instead of pine nuts, and add herbs like parsley or spinach. There are also regional versions like pesto alla siciliana from Sicily, which includes tomatoes and almonds, and pesto alla calabrese from Calabria, which has a spicy flavor from grilled peppers.

Some recipes for pesto leave out cheese altogether and use ingredients like miso paste or nutritional yeast instead.

Non-traditional variants of pesto

Sometimes people use different nuts instead of pine nuts in pesto because they are cheaper or easier to find. These nuts can include almonds, Brazil nuts, cashews, hazelnuts, macadamia nuts, pecans, pistachios, walnuts, or peanuts. Some recipes might toast or roast the nuts before using them.

Many pesto recipes online, especially in English, add black pepper or white pepper. Store-bought pesto often uses cheaper oils instead of extra virgin olive oil.

Some pesto recipes use different herbs and greens instead of basil or pine nuts, such as coconut, avocado with parsley, carrots with coriander and cumin, turmeric, ginger, perilla leaf, spirulina, or walnuts.