Tomato sauce is a sauce of fresh tomatoes that was first invented by the Chinese in the 19th century. It is a fresh red sauce, with the unique flavor of tomato, it is a special kind of condiment, usually not directly entrances. The tomato sauce is made of mature red tomatoes by crushing, slurry, removing skin and seeds, etc., after being concentrated, canned and sterilized. Tomato sauce commonly used as fish, meat and other food cooking seasoning, is to add color, add acid, to help fresh, yuxiang seasoning. The use of tomato sauce is an important flavor of cantonese cuisine.
Ketchup, tomato paste, or tomato sauce is a commonly used condiment made from ripe tomatoes. The basic ingredients for ketchup are tomatoes, vinegar, sugar, salt, incense, cloves, cinnamon, onion, celery and other vegetables.