Grease 6 cups or metal moulds (150-200 ml each) thickly with butter, then dust with flour and chill. Chop the chocolate. Melt with butter over a warm water bath. Stir until smooth and allow to cool slightly. Beat the eggs, egg yolks and sugar with the whisk of the hand mixer for 4-5 minutes until a thick, white cream.
Carefully fold in chocolate mixture. Sift the flour over it and stir in carefully. Pour the mixture into the moulds. Chill for at least 1 hour (maximum 24 hours). Peel and slice the clementines. Chop the pistachios and sprinkle over them. Mix sugar syrup and liqueur and pour over. Chill for 1-2 hours. Bake the mocha pudding in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 12-15 minutes. The pudding is ready when it has risen slightly and shows fine cracks on the surface.
Mix sugar syrup and liqueur and pour over. Chill for 1-2 hours. Bake the mocha pudding in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 12-15 minutes. The pudding is ready when it has risen slightly and shows fine cracks on the surface. Remove from the oven, leave to rest for about 2 minutes and turn out onto 6 plates. Arrange clementine salad on top and sprinkle with pearls. Serve dusted with icing sugar