Adjust the oven tempertature at 220-230 degrees. An hour and a half later, turn the meat over and bake for about half an hour more without opening the oven or the lid of the casserole pot. Even if it sticks a bit, it doesn't matter. It is better because all the extra fat will be gone. If the skin is not all that crunchy, bake for 10΄ more with the lid off.