Tarte au chocolat

This is my favourite chocolate tart recipe, given to me by another fanatical chocolate lover and adapted from a fantastic Joël Robuchon creation in the late 1990s, when very bitter chocolate was becoming very fashionable. The tricky bit my friend left out was ‘beurre pommade’, very soft butter that was meant to be incorporated into the chocolate cream at a certain temperature before baking. It is an amazingly