• Preheat the oven at 350°F or 180° C.
• Prepare one 9x5 inches loaf pan with nonstick spray or homemade pan release and set aside.
• In a large bowl, whisk together flour, pecans, baking powder, salt, cinnamon, nutmeg and set aside.
• In a different bowl, add mashed potato, yogurt, eggs, vegetable oil, vanilla extract, and whisk together until well mixed.
• Add the sweet potato mixture to the flour mixture and mix until there is no traces of flour in the mixture. Do not overmix the mixture at this point.
• Pour the sweet potato bread mixture into the prepared loaf pan.

For Pecan Crumble:

• In a small bowl, combine chopped pecans, brown sugar, flour, butter and stir until combined. The mixture should resemble moist crumbs. Sprinkle the pecan crumble mixture evenly on the top of the bread mixture.
• Bake in the oven for about 45-50 minutes or when toothpick inserted into the center comes out clean. Bring the bread out and allow the bread to cool in the loaf pan for about 10 minutes before transferring it to the cooling rack to cool completely.
• Serve and enjoy.