Pre-heat the oven to 200°C.
In a large saucepan, combine the pear, sugar and water. Bring to a simmer and cook gently for 7-8 minutes, stirring occasionally. Strain and spoon the pear into 4 x 10cm stoneware casserole dishes and allow to cool to one side.
In a food processor, pulse together the all the crumble ingredients apart from the chocolate in a food processor until it resembles breadcrumbs. Transfer to a mixing bowl and stir in the chopped chocolate. Spoon the topping over the pear and bake on a baking sheet for 15-20 minutes until golden brown on top.
Remove when ready and piping hot and allow to cool in the dishes for 5 minutes before serving.