Flame pasteurization system pasteurizes the surface of a food product. A flame tube removes the skin and outer layer of an onion before passing it through a cold bath to cool. The pasteurized and washed product retains the same color and flavor of the original product while increasing yield and reducing the risk of contamination, says the company. The manufacturer received a patent for the flame pasteurization system in February. After pasteurization, onions can immediately be put into the dicing machine. Several companies already use the flame pasteurizer, including Garden Fresh.