Layer marshmellos on top of the pie, starting with the center, making a circle and working your way out around to the outer edges. Start with the largest marshmellos in the center outward and the smaller marshmellos on the outmost circles and filling in between the larger marshmellos. Stack them up until you have a mound, looking like a little mountain. Put pie back into the oven (now on broil) watching constantly until the marshmellos are browned on top and melted. Remove from oven. Top with fudge sauce.