Throwing out the capon carcass means throwing out the best part. The bones, skin and bits of meat still clinging to them make a golden, fragrant stock that sets a little in the fridge: nothing like a cube. It's the base for a risotto, a vegetable soup or a chestnut soup.
The secret comes down to two words: brown and simmer. You brown the carcass pieces at the bottom of the pot for color and flavor, then let it barely simmer for three hours, never boiling: that's what keeps it clear.
Good to know · Use a carcass that went into the fridge within 2 hours of the meal, and make the stock within 2 days of the feast. Once cooked, cool it quickly and refrigerate within 2 hours: it then keeps 3 days in the fridge or 3 months in the freezer. Always bring it to a boil before using it.