In the simplest definition, diced tomatoes are just that, tomatoes that have been diced. It is often used for italian and mexican recipe such as pizza, pasta sauces, soup, stew, casseroles. It is also used to flavor vegetable,chicken or meat dishes. Tomatoes contain anti-oxidant lycopene which helps reduce the risk of prostate cancer in men. It also reduces the risk of heart disease, lung damage and cataracts. It also offers protection from free radical that cause premature aging. Tomatoes are one of the healthiest vegetable around.