By Rose Elliot
This is a very easy, delicious pudding. It also works perfectly using gluten-free flour.
Preheat the oven to 180°C/350°F/gas mark 4.
Put the blueberries into an ovenproof dish, about 20cm (8in) square and 5cm (2in) deep. Mix in the maple syrup.
For the topping, put all the ingredients into a food processor and pulse briefly a few times to mix to a lumpy cru