How to Roast Turkey in a Steam Oven (recipe and tips) Christmas and Thanksgiving, Combination Steam, How To, Just Steam, Mains, Meat, Resources + Info, Roasting, Steam Oven Sous Vide Steaming and then roasting a turkey using your combi steam oven is the best way to get perfect, juicy turkey with golden skin, and it cuts down the usual cooking time by about a third.