These moist and fruity muffins are delicious when served fresh out of the oven. I substitute mixed berries for the blueberries and go for less, if no, vegetable oil.
In a medium bowl, mash the bananas with oil (or applesauce) and sugar and mix well.
In a small bowl, sift salt, baking soda and 2 cups of the flour.
Add the dry mixture to the banana mixture and stir by hand until the two are thoroughly combined. Fold in the berries.
Pour the batter into lined muffin pan.
In a small bowl, combine the 1/2 cup flour, brown sugar and margarine (or applesauce). Stir until the mixture forms coarse crumbs then sprinkle onto muffins.
Bake for 25 minutes or until a toothpick inserted in the middle comes out clean.