Step 1: Slice bananas.
Step 2: In a blender, combine the sliced bananas, kefir, egg, and sugar.
Step 3: Once the banana mixture is smooth, mix it with the flour, salt, yeast, and blueberries.
Step 4: Melt the butter in a pan. Once liquid, add to the dough. The dough should be quite liquid.
Step 5: Pour the dough into a baking dish. Bake at 350 until desired readiness.
Step 6: Cool and serve.