Fake Super Chef?

Mao and Meili travel to Wunam province in China and along the way meet a boy who has fainted from starvation. Mao makes some food for him using igredients from the trees around him. When he is well, the boy tells him his name is Siro and he is a Special Grade Cook (which he isn't!). Since Mao is hiding his Special Grade cook emblem, Mao becomes Siro's disciple!