Preheat your oven to 180°C (356°F). Line a 9x5-inch loaf pan with parchment paper.

Mash the ripe bananas in a large mixing bowl until smooth with a few lumps.

Mix in the beaten egg, Greek yogurt, vanilla extract, and honey into the mashed bananas.

In a blender, combine the rolled oats, sea salt, baking powder, and ground cinnamon; blend until fine flour texture.

Fold the oat flour mixture into the banana batter until just combined.

Pour the banana mixture into the loaf pan, smoothing the top; sprinkle oat flakes on top if desired.

Bake in the preheated oven for 50 minutes until golden brown; check for doneness with a toothpick.

Let the bread cool in the pan for 15 minutes before lifting it out to cool completely on a wire rack.