Traditional Rhubarb Crumble Recipe

"Delicate, slender stems of early Rhubarb appearing in the shops is always cause for celebration and what better way to use them than in this Rhubarb Crumble recipe. The telling sign of fresh rhubarb is not only its bright color; the stalks should be firm and upright, the leaves a pale yellow never black. Some of the best recipes for rhubarb are “nursery-food” a favorite being Rhubarb Crumble served with, of course, custard. This crumble also works well with regular outdoor grown rhubarb, so don't worry when forced rhubarb is not in season...."