Preheat the oven to 450ºF.
Bring the water, seasoned with 1 teaspoon of the salt, to a boil in a large saucepan. Add the potatoes. Boil for 7 to 8 minutes, or until fork tender.
Remove from the pot with a slotted spoon and transfer to a mixing bowl. Add the butter, the remaining 1/4 teaspoon salt, the cinnamon, nutmeg, sugar, pepper, pecans, and syrup and toss.
Pour into a casserole. Sprinkle the top with the brown sugar and the marshmallows. Bake for about 20 minutes, or until the marshmallows melt and turn light brown.
Yield: 6 servings