Beef and fennel stew

Ingredients

• 600 gram beef stewing meat
• 1 leek
• 2 fennel bulbs
• 4 carrots
• about 8 medium-sized waxy potatoes
• 1 onion
• 4 garlic cloves
• 3 bay leaves
• all-purpose flour
• pepper and salt to taste
• 2 tablespoons mustard
• knob of butter
• about 150 ml red wine
• about 200 ml beef stock