Grease and flour a loaf pan with a tablespoon of butter and a little flour.
Rinse 1 cup blueberries (frozen is ok) and coat with one tablespoon flour.
Mix wet:3 tablespoon oil, 3/4 cup milk, one egg, 1/2 teaspoon vanilla. Mash in 2-3 over ripe bananas.
Mix dry: 2 1/2 cup AP flour, 1 cup sugar, four t baking powder, one t salt
Mix wet into dry and stir until combined
Add coated blueberries and mix just enough to distribute
Transfer to the floured pan and bake for about one hour until toothpick comes out clean.
Remove from pan and cool on a rack.
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