Rhubarb apple crumble - this delicious, hearty crumble is easy to make and so satisfying. Tangy stewed rhubarb and apples are topped with a buttery, oaty hazelnut crumble.
Preheat the oven to 200°C/180°C fan/400°F/gas mark 6.
Chop the rhubarb into chunks and peel, core and slice the apples. Place them in a pan along with the sugar, lemon juice and vanilla.
Cook over a low heat for a couple of minutes until the fruit is just starting to soften then remove from the heat and tip into an approx 20 x 24 cm baking dish or a deep 23 cm/9 in pie dish.
Mix the flour and cinnamon together in a bowl. Add the cold butter and rub it in using your fingertips until the mixture resembles breadcrumbs and no large lumps of butter remain.
Stir in the sugar, oats and chopped hazelnuts.
Scatter the crumble topping over the fruit and press it down very slightly.
Bake for about 25 minutes until golden and bubbling.
Notes
See post above for tips, details and step-by-step photos.