Start with the chutney: sauté the chopped onion in a small saucepan with the oil. Add the honey and let it caramelize. Drizzle with the crème de cassis and vinegar, sprinkle with thyme, and add the raspberries along with the finely diced beetroot. Season with pepper and salt. Cover the pan and let it simmer on low heat for 15 minutes. If necessary, let the liquid reduce a bit and let it cool completely.
Slice the roquefort into thin slices and the pickles into fine sticks. Open the buns and grill them. Top each bun with roquefort and 5 slices of duck breast. Add the pickles and finish with chutney and watercress. Insert a skewer through each burger or replace it with a small pine twig if desired.
Tip: you can keep the rest of the chutney in the refrigerator for another 2 weeks. Serve it with a cheese platter, charcuterie, or meatloaf.
Tips
You can keep the rest of the chutney in the fridge for 2 weeks. Serve it with a cheese dish, charcuterie or meat bread.