Prep: 5 minutes; Cook: 60 minutes. If you don't have enough room in your oven for sweet potatoes while roasting the turkey, cook them in advance and reheat while the turkey is resting.
Preheat oven to 450°.
Wash potatoes, and push a thin-bladed knife into the center of each 2-3 times. Place in a foil-lined pan, and roast until tender (about 1 hour).
Heat butter in a small saucepan over medium-low heat until melted. Add syrup, and cook until bubbly and sticky-looking. Keep warm.
Split each potato (use a fork for a homier appearance), drizzle with maple butter, and sprinkle with salt.