Daube de boeuf à la Provençale

Ingredients

• 1 kilo of beef stewing meat
• 600 ml beef stock
• 400 gram chestnut mushrooms
• 3 carrots
• 3 garlic cloves
• 3 small red onions
• 1 chili pepper
• 1 can of tomato paste (140 gram)
• about 150 ml red wine
• olive oil
• pepper and salt to taste
• 2 tablespoons Dijon mustard
• large handful of black olives
• 2 tablespoons paprika powder
• 2 tablespoons all-purpose flour
• 2 bay leaves
• few sprigs of thyme
• about 2 tablespoons herbes de Provence
• about 30 gram dark chocolate
• mashed potatoes or rice for serving