1. To prepare butternut squash, peel, seed and quarter, then cut into half-inch slices.
2. Add the slices to a large saucepan and add water, maple syrup, ground nutmeg, and dark rum.
3. Bring to a boil, then simmer for about 15 minutes, or until the squash is tender.
4. Transfer the squash with a slotted spoon to a heated serving dish
5. Reserve the cooking liquid and boil until thickened. Pour over the squash.