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
Onion sauce or simmer the mixture to create a sauce. Some preparations involve frying the onions until they are browned, while others do not brown the onions. Onion sauce can be used to complement many foods, such as potatoes and peas, meats, such as pork, duck, rabbit, mutton, and liver, such as calf liver. Onion sauce prepared with bread crumbs may be used as a stuffing, which can be used in various poultry dishes, such as goose. Cebolada is a Portuguese onion stew, onion sauce or paste that is prepared with onion as a primary ingredient. It is used on several Portuguese