Fresh blueberries are not readily available in my area, so I replace the 1 cup fresh blueberries with 1/2 canned blueberries and lessened the sugar by 1-2 tablespoons.
Preheat oven to 350º F. Grease loaf pan.
In a large mixing bowl combine flour, sugar, baking powder, baking soda and salt and stir in the oatmeal.
Add eggs, oil and bananas. Stir until just combined.
Pour 1/2 of prepared batter into pan and cover with the blueberries. Then cover blueberries with remaining batter.
Bake 1 hour or until a toothpick inserted into center of bread comes out clean. Cool in pan about 10-15 minutes. Remove from pan and cool completely.
Wrap tightly in foil or plastic wrap and cool in refrigerator before serving.