As a preface I transcribe from “Common Sense in the Household” “Rules applicable to the cooking of all Vegetables.”
Have them as fresh as possible.
Pick over, wash well, and cut out all decayed parts.
Lay them when peeled in cold water before cooking.
If you boil them put a little salt in the water.
Cook steadily after you put them on.
Be sure they are thoroughly done.
Drain well.
Serve hot!