Begin by heating broth in a large saucepan. Add 1/4 C cornstarch to the milk and wisk till mixed. Add mixture to the broth with the salt. Stir and watch how it thickens. As needed, mix 1 TBLS cornstarch with 1 TBLS milk and add to the gravy until desired thickness is reached. NOTE: Daddy often uses all the fat from the bird, along with the gizzard and organs finely chopped. When he uses the fat from the drippings of the bird, he doesn't need to use as much cornstarch. Most of this is done by taste and touch.