Chocolate Kahlua Sweet Potatoes

Lightly scrub sweet potatoes (or, peel now or peel after par-boiling )
Boil potatoes until par-boiled (that is, not mushy yet, as they will be baked for an hour as well )
Heat the coffee liquer, cocoa, butter, and brown sugar in a heavy saucepan, cooking carefully over medium heat until a bit carmelized
Place (peeled and partially boiled) sweet potatoes in large baking dish, chopped up a bit if you like
Pour sugar mixture over sweet potatoes
Bake approximately 1 hour at 350 degrees F, until cooked through and browning on top.