1. Wash the beans and trim the ends
2. Cut the beans in half, or thirds if they are really long
3. Add the beans to a fry pan with the water, butter, lemon, salt and pepper
4. Turn the heat to high and when it starts to boil and steam, cover the pan, reduce the heat and steam for 5 minutes
5. Remove the cover and continue cooking until the water evaporates, tossing or stirring the beans several times, about 3-5 minutes