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Parboiling. Parboiling is the partial boiling of food as the first step in the cooking process. The word is often used when referring to parboiled rice. Parboiling can also be used for removing poisonous or foul-tasting substances from foodstuffs.The technique may also be used to soften vegetables before roasting them.arboiling is the partial boiling of food as the first step in the cooking process. The word is often used when referring to parboiled rice. Parboiling can also be used for removing poisonous or foul-tasting substances from foodstuffs. The technique may also be used to soften vegetables before roasting them.
Parboiled rice. Parboiled rice (also called converted rice) is rice that has been partially boiled in the husk. The three basic steps of parboiling are soaking, steaming and drying. These steps also make rice easier to process by hand, boost its nutritional profile and change its texture.ice is easier to polish by hand (removal of the bran layer) after parboiling but mechanical processing is harder since the bran becomes somewhat oily and tends to clog machinery.