Glühwein (Mulled wine)

1 bottle dry red wine
½ cup water
3 Tbsp natural sugar (add more if you prefer a sweeter wine, we like ours on the dry side)
3 cloves
3 cardamom pods
1 star anise
2 cinnamon stick
half a lemon, sliced

Add all of the ingredients into a heavy bottom saucepan
Leave the wine to warm, until it's just under a simmer (you should see some bubbles and a bit of steam rising)
Allow it to simmer, without boiling, for a few hours