[5] After her studies, she took a summer job at a restaurant in Crans-Montana, Switzerland, and ended up staying for eight years.
[5] Following some time in Thailand, she became a vegetarian, and on her return to France was reluctant to work with meat or fish.
[8] Aside from the food, Vallée extends veganism to the drinks and the decor of the restaurant, which uses renewable electricity and composts its wastes.
[9] In 2018 the Michelin Guide awarded ONA one fork, a symbol for a restaurant of comfort and quality.
[8] Rival guide Gault Millau gave her two chef's hats, its equivalent symbol.