Brocco, here is the recipe: its for marrow rum
1 large ripe marrow, Demerara sugar:
The marrow whould be very firm, too tough for cooking or cutting with a kitchen knife.
Saw (!) through the stalk end, scoop out seeds and pulp. Fill marrow completely with demerara sugar, put top back on and tape tightly in place.
Put into a bag made of strong cloth, hang in a cool dry place.
After 2 weeks fill the marrow again with sugar, seal up again and hang again.
After about a month the marrow will begin to drip.
Take the marrow from the bag and make a hole in it where the drip is coming from. Let tghe liquid run into a muslin-covered funnel into bottles.
Cork lightly. Fermentation will soon start. When it has ceased in a few weeks. cork firmly. Keep for at least a year before using.
Please note I have never done this but often thought about it!