Preheat oven to 375° and grease 2 metal loaf pans.
In a large bowl, combine banana, eggs, yogurt and sugar.
In a small bowl, combine remaining dry ingredients. Add dry ingredients and mix just until incorporated.
Divide batter between 2 loaf pans. (If desired, sprinkle top with cinnamon-sugar.)
Bake until toothpick comes out clean (about 45-50 minutes)
Remove from oven and let cool for 15 minutes before removing from pan. If not serving immediately, wrap in plastic wrap and store in the refrigerator or freeze up to 6 months.