Rognon de Veau en Casserole (Calf's Kidney Baked in an Earthenware Casserole)

Ingredients

• Calf's kidney
• 30 grammes butter
• 1 spoonful good veal gravy

Instructions

1. Trim the kidney, leaving a small layer of fat around it, and season it.
2. Put it in an earthenware casserole with 30 grammes of butter.
3. Cook gently in the oven for about half an hour, turning it often.
4. At the last moment, moisten with a spoonful of good veal gravy and serve just as it is.