This rhubarb betty dessert is a rhubarb version of the classic apple brown betty. This rhubarb betty is made with bread crumbs, butter, and fresh rhubarb. This is a great way to use fresh spring rhubarb. If your rhubarb is more green than red, feel free to add a bit of red food coloring. Or add some sliced fresh strawberries for their brighter color and flavor.