After the sausage is sufficiently browned, sprinkle white flour over the sausage crumbles and stir around in the pan until a paste like substance is made, and all of the pan's grease(there won't be much), is absorbed.
Add milk to the pan (3/4 C per person - approx.), and bring the temperature up to a slow rolling boil, be sure to watch very closley at this point so that the gravy doesn't scorch. Add salt, pepper and garlic powder to taste, while stirring the gravy until it thickens to the desired consistancy, taking care to cook the flour/milk combo for several minutes to get rid of that floury taste! (If gravy is too thin, sprinkle and mix in a little more flour, if too thick, slowly add more milk.)