Preheat the oven to 350℉ and grease the baking pan. Set aside.
Peel and mash the bananas in a bowl. Set aside
Whisk the melted butter, sugar, and eggs till combined. Add the mashed bananas and whisk again.
Add half of the flour, baking powder, salt, baking soda, and nutmeg. Stir gently to combine. Add the remaining portion of the flour and combine.
Lastly, fold in the yogurt until the batter is well mixed. Do not over stir.
Transfer the batter to the greased baking pan and bake in the preheated oven at 350℉ for 1 hour until a cake tester inserted in the center comes out clean.
Let the bread cool in the pan for 10 minutes, then transfer it to a cooling rack to complete the cooling process.