As turnips and potatoes are often boiled and then mashed, so kohlrabi makes a very appetizing dish when prepared in this way. Prepare the kohlrabi and cook it by boiling. When it has cooked soft, drain off the water and mash with a wooden or a wire potato masher. Season with salt and pepper, and add 1 tablespoonful of butter for each pint of cooked vegetable. Serve hot.