put the rest of the stuffing in the baking dish (in the dish, smooth it evenly on top with a spoon and make a few lines with a fork).
put the tray and the dish on the middle shelf of the oven. after 40 minutes, the stuffing in the baking dish should be ready (check that it is cooked through). if so, remove it or wait until it is done. at this stage, cover the potatoes with aluminum foil so it does not burn on the top. cook for another 20 minutes.
check that the potatoes are ready by putting a metal skewer or knife blade through the flesh.
it should then be 