Reminds me of a funny Japanese movie from the eighties, in which the widow of a gourmet wants to become Japan's best noodles cook, and learns the trade in a spoof on karate/kung-fu films. One of the 'masters' she learns from is a homeless ex-gourmet with a following of other homeless cooks, who'd sneak into the kitchen of luxury restaurants after they're closed to cook this or that specialty.

_{*Lunatic*, n.
One whose delusions are out of fashion.}