On the Menu Today~ Rhubarb Banana Sourdough Scones with Lemon Glaze Sourdough, Banana and Rhubarb. This recipe is perfect because it has all three. Rhubarb Banana Sourdough Scones.. Has a nice banana flavor, along with a tart bite from the rhubarb and the sourdough lends a nice tang. Perfect blend of flavors. The Lemon Glaze