Step by step

Add the cuttlefish, let its liquid evaporate and then add some wine to reduce

Tips
If you buy a fresh cuttlefish, remember to clean them carefully: inside you might find some eggs in a black bag – they’re particularly good as a condiment.
Trivia
In the past cuttlefish were a source of black ink for writing, and their bones were crushed and then used to make toothpaste.