Few people can resist crumble, especially when it's served with custard. Try this cheat's way of making it.
Preheat the oven to 180C/350F/Gas 4.
Combine all the ingredients except the muesli or granola and spoon into a baking dish.
Sprinkle with the muesli or granola and bake in the oven for 45 minutes until golden and the fruit is bubbling.
Serve with vanilla custard.
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