Preheat oven to 350F. Gently grease a 9x5 inch loaf pan with butter.
Whisk together the flour, granulated sugar, baking soda, cinnamon, pecans, salt and nutmeg in a large bowl.
In another bowl, mix eggs, melted butter, buttermilk, brown sugar and vanilla. Stir in mashed bananas.
Now, fold in the banana mixture into the flour mixture until combined. Do not over mix; it is alright if there are some lumps.
Pour the batter into the loaf pan. Bake for 1 hour until brown. Allow the bread cool down in the pan for 10 minutes and then transfer itto the cooling rack. Slice and serve.