Ingredients for 10 servings

  1. 1 carrot
  2. 1 large onion
  3. A small celery branch
  4. A knob of butter
  5. 20 g (0.7 oz) of lardons
  6. Thyme flowers
  7. 1 bay leaf
  8. 30 cl (1.25 cups) of alcohol vinegar
  9. 10 cl (0.4 cup) of white wine
  10. 50 cl (2.1 cups) of veal stock + 20 cl (0.8 cup)
  11. 50 g (1.75 oz) of fresh Paris mushrooms
  12. A dozen black peppercorns