Rhubarb Upside-Down Cake Recipe

Is rhubarb a fruit or vegetable? Apparently, in the US it's considered a vegetable. The only way I've eaten is is in desserts. So, I say it's a fruit. Yes?

Spring is when rhubarb makes it's appearance in the produce section. Where we live, we can buy it until late fall. They resemble celery stalks with vibrant colors of red and green. The only recipes I've used rhubarb is in Strawberry-Rhubarb Pie or Fruit Crisps. The strawberries give a sweet contrast to the tartness of the rhubarb, in a good way. It's even better with a scoop of vanilla ice cream.

One of the reasons I was anxious to make this coffee cake is that rhubarb is the star of the show-- and I thought that the caramelized rhubarb looks really pretty, once the…