(Don't forget that the leaves of rhubarb are poisonous - only use the stalks!)
Preheat oven to 375.
Chop rhubarb into roughly 6-inch pieces.
Toss with maple syrup to coat.
Place on a buttered baking dish.
Bake for 15-20 minutes, or until soft.
You can put the rhubarb and juices into a bowl and mash them up a bit, or leave the large pieces whole, depending on what you plan to do with them.