Combine first 6 (dry)ingredients in a medium bowl.
Make a well in center of mixture.
In another medium bowl, first smash the ripe bananas.
Then add the remaining (wet) ingredients; mix well.
Add these wet ingredients to the dry mixture. Stir until moistened. Do not overmix or bread will not be light and fluffy.
Pour batter into a greased 9 x 5 x 3 inch loaf pan.
Top with oatmeal streusel.
Bake at 350˚ for 45-50 minutes or until a wooden pick inserted in center comes out clean.
Cool in pan 10 minutes; remove from pan, and let cool on wire rack.