Ingredients for 4 servings

  1. 1 beautiful pale veal kidney
  2. 2 shallots, minced
  3. 200 g brown mushrooms, wiped clean, cut into quarters
  4. Mustard seeds in a tea infuser ball
  5. 20 cl heavy cream
  6. 20 cl veal stock
  7. A knob of butter
  8. Salt and pepper
  9. 2 tablespoons sunflower oil
  10. 10 fresh sage leaves, minced, or 1 tablespoon dried sage
  11. 200 g new potatoes
  12. 1 sprig of thyme
  13. 1 bay leaf
  14. Sea water or salted water
  15. Fine butter