Rhubarb Cake with Cinnamon Topping

On Mondays at work we have a collaboration session. The twelve of us in our department have a scheduled meeting to discuss issues and share ideas. I try to provide a snack at collaboration since it's a rare time when we are all together. I made this cake two Mondays in a row for collaboration.

The first week I made this it was because I was so excited to see rhubarb in my grocery store. The second week it was requested by a British colleague who realised that rhubarb was one part of a UK spring that he had been missing. The crumbly cinnamon topping adds a nice counterpoint to the tart and soft rhubarb.