Who is Madame Louisette Bertholle from My Life in France and what is their importance?

Madame Louisette Bertholle was a consultant on Mastering the Art of French Cooking. Julia met Louisette through Simca, who was working on the early versions of the cookbook with her. The three formed their own cooking school in Paris and enjoyed working together. When Julia began to work on the cookbook with them, Louisette gradually faded into the background, largely because of her family responsibilities and husband. She remained a consultant on the project, although Julia and Simca did most of the work.