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,
Green sauce with the other ingredients, which creates an emulsion somewhat similar to a vinaigrette. In other regions, there is no bread. Salsa verde is used as a condiment or dipping sauce for meats, fish, poultry, or vegetables. Salsa verde is traditionally served as an accompaniment to bollito misto or grilled or stewed fish. The French "sauce verte au pain" was already known in the Renaissance, and was originally a bread sauce very similar to the Italian. Today the term frequently refers to a kind of mayonnaise flavoured with tarragon, and sometimes parsley and sage. Lemon juice is often used instead of