Ingredients:

1 cup hot water
1/2 lemon, juice of
1 -2 teaspoon fresh lemon zest
1/8 teaspoon freshly grated nutmeg
1/2 cinnamon stick
1 tablespoon fresh ginger, peeled and sliced (cherry-tomato size)
1/2 teaspoon butter
2 tablespoons brown sugar
1 ounce dark rum
 
Method:

In a small pot over medium heat place all ingredients except rum. Simmer for about 5 minutes.
In a large mug pour about 1-2 fingers of dark rum. Pour contents of small pot through a strainer into the mug.
Sip while hot.
Go straight to bed.