1/2 cup dried blueberries or 1 cup fresh blueberries
Heat oven to 350 degrees F. Coat a loaf pan with nonstick cooking spray.
In a medium bowl, sift together flour, baking powder, baking soda and salt. In a large mixing bowl, using a mixer on medium speed, beat together bananas until finely mashed; add sugar, butter, oil and vanilla. Beat until well combined and creamy. Beat in eggs until combined - about 1-2 minutes. Reduce mixer speed to low and beat in Greek yogurt, flour mixture and oats until just combined. Stir in blueberries until combined.
Divide into 4 mini loaf pans. Bake 35-40 minutes, or until golden brown and set. Cool on a wire rack before slicing.