2) Add the reserved fat to the roasting pan and place on a burner over a medium-high heat. Add the shallot, garlic, rosemary, thyme and bay leaf; season with salt and pepper. Cook until the shallot is tender, about 3 minutes.
3) Make a paste with the butter and flour in a small bowl; set aside. Add the broth to the pan and scrape up any browned bits from the bottom of the pan with a wooden spoon. Bring to the boil and whisk in the flour mixture.
4) Boil until the sauce thickens to make a gravy, about 4 to 5 minutes. Adjust the seasoning, to taste. Remove and discard the garlic and bay leaf. Serve.