Heat oven to 350 degrees. Coat 9-by-5-inch loaf pan with olive oil.
In mixing bowl, mash 2 bananas. Add applesauce, egg, egg white and vanilla to bananas and whisk.
In separate bowl, combine flour, sugar, baking soda, salt and cinnamon. Slowly add wet ingredients to dry ingredients and mix. Add olive oil slowly and mix until combined.
Fold in chocolate chunks. Pour batter into loaf pan.
Heat nut spread in microwave until it reaches pourable consistency. Swirl spread into top of batter. Thinly slice long, flat strips of banana. Add slices to top of batter for decoration.
Place loaf pan in oven and bake 1 hour. Remove bread and cool before slicing.