Wash potatoes and poke with knife (to release steam when baking).
Bake at 350* for approx 45 minutes. Potatoes should be almost tender.
When potatoes are cool to touch, peel potatoes.
Cut into 2" pieces.
When the potatoes are cooling, place butter in oven proof baking dish, and place in warm oven to melt butter.
Place potato pieces into melted butter.
Top generously with brown sugar. Sprinkle with salt, pepper, and nutmeg.
Bake at 325* for 15 minutes. Turn potatoes (you want all sides well coated with butter/sugar).
Reduce oven temp to 275* and continue baking for approximately 2 hours, carefully turning potatoes every 15-20 minutes. If it seems butter/sugar is caramelizing too quickly, reduce oven to 250*.
Potatoes should be caramelized, deep in color, and fork tender.