Put the apple in a bowl suitable for microwaves.

Microwave for about 5 min at 900w until cooked.

Let the apples cool for a couple of minutes, then blend them in a small food processor until smooth.

Melt chocolate with coconut oil.

In a bowl combine the melted chocolate with the apple puree until you get a homogeneous mixture.

Pour into a 15cm square mould, lined with baking paper.

Refrigerate for a minimum of 4 hours.

Sprinkle it with cocoa powder.