Recipe for mirepoix sauce (for masking meat, fowl, fish). This page incorporates text from the public domain cookbook The Cook's Decameron: A Study In Taste, Containing Over Two Hundred Recipes For Italian Dishes by Emily Waters.
Bacon, diced
Lean ham, diced
1 carrot, diced
Onions
a bunch of herbs (such as parsley, thyme, sage, rosemary)
Mushrooms
2 cloves
4 peppercorns
2 ½ cups stock
1 glass Chablis wine
Combine bacon, ham, carrot, onions, herbs, mushrooms, cloves, and peppercorns in a stew pan.
Add the stock and Chablis.
Boil rapidly for 10 minutes, then simmer until it is reduced to a third of its former volume.
10 minutes
Pass through a sieve and use for masking meat, fowl, fish, etc.