Prepare rhubarb by trimming ends, washing, and dicing in 1/2 inch pieces. Toss with 1/2 cup sugar and set aside to sweeten.
In a mixing bowl cream together 1/2 cup sugar and butter. Add eggs. Mash bananas and blend well into wet ingredients along with sour cream and vanilla.
Whisk dry ingredients and slowly pour into wet ingredients. Combine well. Fold in rhubarb, careful not to mash the pieces. Add chocolate chips if you choose!
Pour into a buttered loaf pan and bake in a 350 degree oven for 1 hour. Perhaps longer, check at 1 hour with a toothpick and when it comes out clean and the top is golden brown you’ll know it’s done. Allow your loaf to cool for 15 minutes and then flip onto a cooling rack.