Preheat the oven to 180°C /gas mark 4.
Line a 20cm square cake tin with baking parchment.
Put the roughly chopped dates, butter, eggs into the bowl of a food processor and process until smooth.
Add the ground almonds and process briefly.
Transfer the mixture to a large mixing bowl.
Dice the pears into 1cm cubes and stir them through the mixture together with the chopped macadamia nuts.
Break up the chocolate and place in a small heatproof bowl set over, but not touching, a pan of simmering water.
Allow the chocolate to melt completely and fold into the brownie mixture.
Pour the mixture into the prepared tin and bake for 15-20 minutes, remove from the oven when a skewer inserted into the centre comes out cleanly.
