Preheat oven to 400 degrees. Place potatoes on a foil-lined cookie sheet, and bake for approximately 1 hour (depending on size) or until soft. Remove from oven; allow to cool.
Peel the cooled potatoes; place in a bowl. (Easy clean up: When peeling the potatoes, place the skins back onto the foil. Gather the foil and skins together and toss.)
Add the melted butter, cinnamon, nutmeg, salt, and orange juice to the sweet potatoes. Beat together with a hand mixer until lumps are removed. If needed, add more orange juice.
Heat on the stove or in the microwave; serve with a dab of butter and pomegrante seeds on top!