How to make the perfect rhubarb crumble and the common mistakes to avoid

Serve rhubarb crumble with custard or cream - preferably both.
You may have been brought up with a rhubarb crumble that was a stringy mess, but this does not have to be the case. By cutting it into thumb-sized pieces, your rhubarb should maintain its shape for the most part, and result in a far more palate-pleasing result.