Indeed, the brew was much thicker than Grandmother's potato stew. After awhile, it took on sticky, gel-like consistency. Qi-lin hoof turned it even whiter and thicker yet. And the makeshift stirring rod kept going round and round tirelessly in the cauldron under the Locomotor charm.
Later, when the brewing process finished, Al began putting away the leftover ingredients, as Severus still monitored the cooling substance with watchful eye.
He didn't quite know what to do with the Hand of Yam, now that it fulfilled its purpose. It couldn't go back in the bag where it came from now that it came into contact with other ingredients. Al looked around for another container for it and after a few seconds of searching saw a perfect one.
A single oddball mitten hanging off the top shelf. It was the perfect size for the overgrown yam and even accommodated its hand-like shape. Grinning, Al reached for the mitten and tugged it over the useful root. That should keep it dry, and dark, and isolated, until we need it again.