Pesto became a staple in the Ligurian culinary tradition, with each family often featuring its own pesto recipe (with slight differences to the traditional ingredients). This is the main reason why pesto recipes often differ from each other. In 1944, "The New York Times" mentioned an imported canned pesto paste. In 1946, "Sunset" magazine published a pesto recipe by Angelo Pellegrini. Pesto did not become popular in North America until the 1980s and 1990s. Pesto is traditionally prepared in a marble mortar with a wooden pestle. First, garlic and pine nuts are placed in the mortar and reduced to a cream,
Garlic sauce in various cuisines. Mujdei is a spicy sauce in Romanian cuisine made from garlic cloves crushed and ground into a paste, salted and mixed with water and vegetable oil. Sunflower oil is almost always used. Skordalia is a thick puree (or sauce, dip, spread, etc.) in Greek cuisine made by combining crushed garlic with a bulky base—which may be a purée of potatoes, walnuts, almonds, or liquid-soaked stale bread—and then beating in olive oil to make a smooth emulsion. Vinegar is often added. Ta'leya is a garlic sauce in Egyptian cuisine made by frying garlic and adding vinegar and spices.