Tucked up in the hills between Cannes and Grasse, a small stucco villa once owned by America's most beloved culinary icon is bustling with the clatter of copper pans at chef Makenna Held's Cook Camp.

The martinis are cold, the oysters endless and every table sounds like a dinner party. Lately, going out for martinis, fries, and oysters has become the night-time version of matcha and froyo — a ...