Danish Veal Soup with Madeira and Mushrooms

Ingredients

• 2 tbsp of butter
• 0.5 lb (227 g) of thinly sliced mushrooms
• 2 tbsp of flour
• 1.5 pt (710 ml) of veal stock
• 1 tsp of salt
• 1 tbsp of fresh chervil , chopped or 1 tsp of dried chervil
• 0.63 cup of heavy cream
• 3 tbsp of madeira