My wife and I just finished watching a wonderful French Movie called Haute Cuisine about Daniele Mazet-Delpeuch who cooked for the French President for two years.
She was hired to cook for the President because he was tired of the fancy-flare style food he was being prepared and wanted to have more traditional French food like his grandma used to make for him.
Daniele never went to a culinary school and learned her cooking style from her grandma and family.