Preheat the oven to 350 F.
Mash the bananas until smooth (a few chunks here and there is fine) in a large bowl with a fork.
Add eggs, butter, and sugar to the large mixing bowl and beat until smooth on low with an electric mixer or hand mixer.
In a medium bowl toss the fresh berries with 1 tablespoon of flour.
In a separate bowl combine dry ingredients. Now add to wet ingredients in batches mixing on low at the same time. Stir in the berries.
Pour batter into a 9 x 5 inch loaf tin (greased with a little butter or vegetable oil or lined with parchment paper or foil). The batter will be somewhat sticky. Make a small cut lengthwise about ½ inch deep in the center of the bread. Decorate with berries on top.
Bake for 1 hour and 35-40 minutes (or it may take you slightly more, depending on the oven!) until the toothpick inserted into the center comes out clean or with a few breadcrumbs.
Remove the bread from the oven and let it cool in the bread pan for 10 minutes. Later transfer the whole loaf to a wire rack to cool completely.
Cut into 10-12 thick pieces, top with extra blueberries if you like, and enjoy.