The potatoes lend this puree a light texture and delicate flavor.
Place in a large saucepan:
Add cool water to cover generously, bring to a boil, reduce the heat, and simmer until the vegetables are completely tender, 20 to 25 minutes. Drain and return the vegetables to the pan. Over low heat, mash the vegetables with a potato masher or beat with a handheld electric mixer until smooth. Mix in:
Taste and adjust the seasonings. If desired, top with: