Place the potatoes, 2 cups water, salt and pepper into a medium saucepan
with a lid. Bring to a boil and return to a simmer
, cover and cook until very tender, about 20 minutes. Add the potatoes, but not the liquid, to a food processor
, and puree until smooth. Add the butter and the vanilla bean
seeds to the puree, and pulse
again until all ingredients are incorporated and smooth. Hold until ready to plate.