Oven-roasted lamb legs are wrapped in tin foil. This is directly related to the baking principle of the oven. The oven uses luminous wires to heat the object to mature it, so the object it bakes matures very quickly. And the water evaporates very quickly, so in order to make the meat of the lamb leg richer and prevent it from drying out and burning, you can wrap it in tin foil to solve this problem.

The purpose of wrapping the lamb legs with tin foil is to heat them better and to lock in the meaty flavor of the lamb legs.