The Miracle dish, (also known as Miracle Dumplings) is the specialty of Starlight Temple's chef, Lao Chao, and can cure any illness. It resembles a dumpling resting upon a leaf. Its key ingredient is the White Windflower, which no longer grows in his time. Therefore if Max and Monica want one made to help Lin, they'll have to go to Barga's Valley in Starlight Canyon to find it.
Once Lin eats it, she recovers instantly from her Toxic Mist poisoning.