For those who have the time and the inclination to make vegetable stock, though, the reward is in the flavor. Making it is simple and can be a good way to use parts of vegetables that we may usually discard. To do this, wash and save the stalks, leaves, peelings, roots and ends of vegetables after using them, and keep them in a bag or container in the freezer. Your homemade vegetable stock can be a life changing habit in vegan cooking, check the recipe below.