At 13 years old, most people are agonizing over homework. At that age, Flynn McGarry was agonizing over ingredients for the $50 10-course tasting menu served at his pop-up restaurant Eureka, which was run out of his San Fernando Valley, California, home.

Even the teenage mischief he got into was culinary. Like the time he snuck into his neighbor's yard — to pluck herbs for a dinner.