A steam cooker is a kitchen appliance in which your food can be cooked by the heat of the steam that is held in the closed vessel reducing steam escape. Cooking with a steamer is an ancient method of cooking. Ancient Chinese were preparing food in bamboo boxes containing finely chopped foods. Today the Chinese are still using this age-old method of cooking with amazing results. With more high tech appliances today we are able to do much more. When steam cooking, the foods retain not only their smell, appearance but also the taste and most of the micronutrients and vitamins that are present in the raw product. You can cook all types of vegetables in a steamer, some people also like to cook meat, fish, poultry, and some types of seafood too.