Pesto been used for all sorts of cold sauces or dips, mostly without any of the original ingredients: arugula (instead of or in addition to basil), black olives, lemon peel, coriander, or mushrooms. In more northern countries, ramson leaves are sometimes used instead of basil. In the 19th century, Genovese immigrants to Argentina brought pesto recipes with them. A Peruvian variety, known as "tallarines verdes" (meaning "green noodles", from Italian "tagliarini"), is slightly creamier, lacks pine nuts (because of their rarity and prohibitive cost in Peru), may use spinach and vegetable oil (in place of olive oil), and is sometimes served
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