Preheat oven to 350 F (180 C) and line a 9x5 inch loaf pan with parchment paper that hangs over the longer sides of the pan like wings.
In a medium bowl hand whisk together flour, baking soda, salt, cinnamon and nutmeg. Set aside.
Using a separate large bowl combine melted butter with the granulates sugar and dark brown sugar. Hand whisk together until well combined.
Add the following ingredients one at a time and gently mix until incorporated. Hand whisk in mashed bananas, then eggs, greek yogurt, and vanilla extract.
Next, sprinkle flour mixture a ½ cup at a time into the wet mixture, whisking enough to completely mix in flour without over working batter.
Then fold semi-sweet morsels into the batter with a rubber spatula.
Pour batter into prepared loaf pan. Place pan on middle rack of oven.
Bake for 65-70 minutes until toothpick inserted comes out mostly clean with a few moist crumbs.
Place pan on cooling rack for 10 minutes before lifting loaf from pan by pulling upward on over hanging parchment paper.
Slice and serve.