Grease the sides of a ramekin. Put the rhubarb in the bottom.
To make the crumble topping, rub all the ingredients, except the pecans and soft brown sugar, between your fingers so it resembles breadcrumbs. Stir in the pecans and then put on top of the rhubarb. Sprinkle the brown sugar on top.
Bake in the oven at about 180C for approximately 25 minutes or until the topping has browned.
Serve with yogurt, custard, ice cream or cream.
Nutritional information is approximate and a guideline only.