Sweet Potatoes with Maple-Cider Glaze

3 # Sweet potatoes, peeled and sliced lengthwise.
4 T butter
6 T maple syrup (spring for the real thing)
1 C apple cider (again, the real thing)
pepper

heat over to 350. Butter 9x13
Arrange potatoes in the pan, drizzle with with syrup and cider. Bake, basting about 3 times in 50 minutes. Sprinkle with pepper.