Yes! This gluten-free blackberry and apple crumble is a great pudding to make ahead for a lunch or dinner party. On the day, you can make it up to the point of assembling the crumble and then keep it covered in the fridge for a few hours until you’re ready to pop it into the oven when you are just about to start the meal.  Alternatively, you could make each of the filling and crumble mixtures a few days in advance and keep them separate in the fridge and then assemble and bake on the day.