Ingredients

• 1 1/2 teaspoons salt
• 4 tablespoons dry buttermilk
• 1 cup quick-cooking oats
• 2 1/2 cups unbleached white flour (from hard wheat)
• 3 tablespoons brown sugar
• 1/3 cup steel cut oats, soaked in 1/3 cup boiling water until the mixture is at room temperature
• 1/4 cup water
• 2 tablespoons vegetable oil
• 1 tablespoon yeast
• 1 cup banana, very ripe, mashed
• 1 extra-large egg