Enjoy your vegetables raw as often as you can – in a salad, for example. Cooking destroys many valuable components.
Nonetheless, fresh vegetables cooked gently in a steamer or pressure cooker form an important part of our diet. Use seasonal products. Frozen products, too, have come to be an important part of our diet. Most vegetables and many kinds of fruit freeze and defrost well. If you prepare them with little fat and sugar, you are well on the way.