Preheat oven (electric cooker: 150 °C/circulating air: 125 °C/gas: level 1). Line two baking trays with baking paper. Stone and dice the dates. Beat the egg white until stiff, adding icing sugar and cinnamon.
Mix rum, starch, dates and both types of almonds and fold into the beaten egg white. Spread the wafers on the trays.
Pour egg mixture into a piping bag with a large perforated spout and spray evenly onto the wafers. Bake in a hot oven for 15-20 minutes one after the other. Let them cool down. Roughly chop the chocolate, fill into a small freezer bag or piping bag and melt in a hot water bath.
Cut off a small corner. Decorate the clouds with chocolate strips. Let it dry.