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,
Peanut sauce or peanut butter (smooth or crunchy), coconut milk, soy sauce, tamarind, galangal, garlic, and spices (such as coriander seed or cumin). Other possible ingredients are chili peppers, sugar, fried onion, and lemongrass. The texture and consistency (thin or thick) of a peanut sauce corresponds to the amount of water being mixed in it. In Western countries, the readily and widely available peanut butter is often used as a substitute ingredient to make peanut sauce. To achieve authenticity, some recipes might insist on making roasted ground peanuts from scratch, using traditional stone mortar and pestle for grinding to achieve desired texture,