I have now made this tart 6 times. It is possible to get wrong (more is not always more when it comes to chocolate), but it is also possible to get sublimely right. The recipe is incredibly simple. Perhaps the best testimony is that a dessert-disdainer had two helpings...

Those who eat it immediately demand the recipe. Though I am loathe to reveal my secrets, here it is, courtesy of Gourmet Magazine.