Just as important as the foods you cook is what you cook them in. Use vegetable oils instead of solid fats like butter, margarine, shortening, or lard. Canola, olive, safflower, corn, and soybean oils have healthy monounsaturated fatty acids. Choose the one that tastes best to you. Use these oils to sauté, bake, or stir fry, but never to deep fry, which adds calories and fat.