Hippocras - cooking recipe

Ingredients

5 liters red wine (not too aged and strong, I use Grignolino)
750 g sugar
40 g ground cinnamon
40 g ground ginger
20 g ground galangal

Preparation

Mix the dry ingredients into the wine, till most of the sugar dissolves.
Let sit for 2 hours, stirring every now and then.
Filter the wine, eliminating all the spices, several times, so as to obtain a clear liquid. I use a cloth towel bag to filter out most of the spice, and then pass the wine in a percolating filter, that works fine.
Bottle and let sit in a cool place for at least a couple of days. Best after a month or two.