The steam function of a built-in steam oven is ideal for healthy cooking. Steam cooking helps retain the natural flavors, nutrients, and colors of the food, making it a great option for those who want to maintain a healthy diet. Use the steam function to cook vegetables, fish, and poultry, as it helps preserve their moisture and tenderness. Steaming also eliminates the need for added fats or oils, making it a low-calorie cooking method.