Cut the chicken breast into pieces and fry in hot olive oil. Season with salt and pepper.
Peel the onion and cut into cubes. Dice the chilli pepper (with or without seeds, if you like) and add to the meat together with the diced onion. Continue frying while stirring. Clean the peppers and cut into pieces, add to the meat and also fry briefly. Season with cumin to taste. Add tomato paste and sweat with it. Then deglaze with the chicken stock. Cover and simmer for approx. 20 minutes. Then add the chocolate, let it melt in the sauce and season again if necessary. Serve hot.
Tip: Possibly round off with a little whipped cream.