in 4 quart pot cook sausage, drain reserve 1/3 to 1/2 of sausage grease

in same pot add reserved grease and onions cook til tender

in large bowl mix milk heavy cream parsley salt pepper and flour beat with whisk

add milk mixture to pot when onions are tender also add sausage to pot mix cover and bring to a boil stirring every few minutes

boil few minutes or until gravy thickens serve over biscuits, pancakes, or even toast