Instructions

1. 1
   Preheat oven to 190°C (375°F / gas mark 5).
2. 2
   Cut the rhubarb into pieces and stew for a short time with the caster sugar and water until tender.
3. 3
   While the rhubarb is stewing, combine the flour and butter in a bowl until it resembles fine breadcrumbs.
4. 4
   Stir in the brown sugar.
5. 5
   Place the cooked rhubarb in a deep pie dish (1 L / 2 pt).
6. 6
   Spoon over the crumble topping and spread out evenly
7. 7
   Bake crumble for about 25 mins until the crumble is golden brown.