Steam the potatoes in a large covered pan fitted with a steamer basket until they are tender, about 8 minutes.
In a large bowl mash the potatoes with the buttermilk and orange juice. Stir in the zest, salt, and nutmeg. Serve the potatoes topped with the butter, if desired.
Recipe Analysis Note: Ingredients without discrete measurements such as "Salt, to taste" or "Ice cream, optional" are omitted from analysis. This is because amounts can be highly variable and difficult to determine.
Recipe courtesy of Ellie Krieger, 2007, All Rights Reserved