1) In a heatproof bowl, melt the Godiva dark chocolate over a pan of simmering water. 2) Stir until smooth and then set aside.In a separate bowl, whisk egg yolks and sugar until pale and thick3) In a saucepan, warm the heavy cream until it just begins to simmer. 4) Gradually add the cream to the egg yolk mixture, whisking constantly.5)Pour this mixture back into the saucepan and heat gently, stirring, until it thickens.6)Remove from heat and fold in the melted Godiva chocolate until smooth.7)Pour the mousse into the tart shell and refrigerate for at least 4 hours.8)Garnish with chocolate shavings or gold leaf for an added touch of luxury.