Using a mortar and pestle, grind the tea leaves to a very fine powder.
Put the chocolate and tea powder in a large heatproof bowl set over a pan of barely simmering water. Leave to melt, then pour into
20 heart-shaped moulds (or similar). Leave to cool to room temperature, then transfer to the fridge for 2-3 hours, until set hard.
Carefully remove from the moulds and serve or gift.