Sofrito is heavily emphasized as the third critical component in a "sofregit" base along with tomatoes and onions. Garlic is optional, as it is not considered an integral part of the standard "sofregit" recipe. Some "sofregit" recipes do not contain tomatoes at all, but are made more complex with the addition of diced vegetables such as leeks or bell peppers. In Italian cuisine, chopped onions, carrots and celery is battuto, and then, slowly cooked in olive oil, becomes "soffritto". It is used as the base for most pasta sauces, such as arrabbiata sauce, but occasionally it can be used as the
Chili oil or as a condiment. The default kind is typically a clear, chili-infused sesame oil, and the chopped chili pepper used is typically red, imparting a reddish tint to the oil. Other ingredients used may include soy oil, corn oil, dried aloe, ginger, guava leaves, leek leaves, paprika, and turmeric. Beginning in 2009, a new type of product known as became a trend in 2010. This variety is known for reduced spiciness, and in addition to the usual oil, chunks of food are included such as fried garlic and fried onion. The Italian variety of chili oil (olio di peperoncino) originates