Being fresh out of game bones and game carcasses, I made 2 gallons of something between stock and glace. It's rich enough to turn into firm gelatin when put in the fridge.
I sauteed a pile of chopped carrots, onions, whole head or two of garlic, celery (all skin on) in olive oil until browned.
You always brown bones, meat, and carcasses for a French, Anglo, or American stock. I browned a pile of veal bones, chicken wings, a chicken carcass, and turkey legs in the oven. Then I threw it all in the stewpot with a jug of Chardonnay, a bottle of cheap ruby port, some water, a handful of fresh thyme sprigs and a handful of fresh parley, a handful of frozen blueberries, half of a small can of tomato paste, a handful of dried oyster and porcini mushrooms, and a handful of peppercorns, and low-simmered it all for 6 hours. Three hours with lid on, three hours with lid off.
Then I strained it all, and I am reducing it a bit more. Smells good. Not sure what I would call this, except delicious and fragrant. Not for beef, though. As a base, you can add currants or berries or berry jam to it for a venison sauce, some chopped apple for a pork sauce, mushrooms for a poultry sauce, etc.
It's glace when a stock is reduced to a syrupy state, which I rarely if ever do. You have had glace in restaurants though, on the plate under a piece of meat. I just aim for a thick, intense stock and I call it "jus" or "gravy," although it is not gravy. It's super-jus.
Stocks and glazes, including:
Glace de Volaille (Chicken Glaze): Make chicken stock and reduce to about 1½ cups of glaze.
Glace de Poisson (Fish Glaze): Triple the recipe for fish stock and reduce to about ¾ cup.
Glace de Gibier (Game Glaze)