Romesco (Catalan pronunciation: [ruˈmɛsku]) is a sauce originating in Tarragona (Catalonia, Spain) that is typically made from almonds, pine nuts, and/or hazelnuts, roasted garlic, olive oil and nyora peppers, a small, round, variety of red bell pepper. Other common ingredients include roasted tomatoes, red wine vinegar and onion. Leaves of fennel or mint may be added, particularly if served with fish or escargot. It is perhaps most often served with seafood, but can also be served with a wide variety of other foods including poultry and vegetables, particularly calçots.