Steaming. This is a healthy and simple option. ... Stir-frying and sautéing. Quick, easy and healthy, these methods mean that food is only cooked for a short time in a small amount of oil, which helps maintains the texture and nutrients of the food. ...To retain these vitamins, cook vegetables in as little water as possible for a minimal amount of time (unless you're planning to consume the water, as in a soup). Steaming and microwaving, both of which use little water, will give you the same results as boiling or blanching but with much less nutrient loss.