Career
Johnston was born Mireille Busticaccia in Nice on 4 October 1935. In 1992, Johnston appeared in A Cooks Tour of France, a British Broadcasting Corporation television cookery series. She also translated the film The Sorrow and the Pity – about the collaboration of French nationals in a town during the Second World War.
Johnston died in Paris, France on 5 October 2000.
She was the author of two regional French cookbooks, The Cuisine of the Sun, on the cooking of Provence and The Cuisine of the Rose, on the cooking of Burgundy.