Pesto has been pointed out that pesto is essentially a combination of flavourful leaves, oily nuts, hard cheese, olive oil, garlic, salt and lemon juice; any ingredients meeting this description can produce a pesto-like condiment. "Pesto alla siciliana", sometimes called "pesto rosso" (red pesto), is a sauce from Sicily similar to "pesto alla genovese" but with the addition of tomato, almonds instead of pine nuts, and much less basil. "Pesto alla calabrese" is a sauce from Calabria consisting of (grilled) bell peppers, black pepper and more; these ingredients give it a distinctively spicy taste. Outside Italy, the household name "pesto" has
Tomato sauce roux). All of these qualities make them ideal for simple and appealing sauces. In countries such as the United Kingdom, Australia, New Zealand, and South Africa, the term "tomato sauce" is used to describe a condiment similar to ketchup. In some of these countries, both terms are used for the condiment. The use of tomato sauce with pasta appears for the first time in 1790 in the Italian cookbook "L'Apicio moderno", by Roman chef Francesco Leonardi. The simplest tomato sauce consists just of chopped tomatoes cooked down (possibly with olive oil) and simmered until it loses its raw flavor. Of