Rhubarb and Cake

The rhubarb keeps growing and growing.      I'm not complaining, but I do try to find new things to do with it, although Max would quite happily eat rhubarb crumble every day of his life, as long as it came with lashings of custard. My beautiful old books have plenty of recipes for rhubarb, but I really didn't want to make jam, preserve, or vinegar from it, well not this early in the rhubarb