Roughly chop the chocolate, melt it, allow to cool slightly. Gradually stir in the yoghurt with the whisk, add honey or sugar to taste.
Halve the pitahaya, scoop out the pulp. Peel the mango, cut the pulp from the core, fold both diced with a handful of Amarettini into the chocolate yoghurt.
Arrange in the pitahaya halves.
Arrange the rest of the cream in glasses or bowls, garnish with pieces of fruit, amarettini and chocolate sticks.