Julia Child's Mousse au Chocolat or Chocolate Mousse

With so many people rediscovering Julia Child, or discovering her for the first time, with the help of the movie Julie & Julia, and Julie Powell's book by the same name, I thought it would be fun to save room for a Julia Child dessert.Today, I'm sharing her Mousse au Chocolat or Chocolate Mousse. It's all over the Internet, including on well-respected sites, likely a recipe used by the publisher