Cook the chopped apples in the microwave for 3-4 minutes, stopping at the end of each minute to stir. (You want them somewhat cooked but not mushy!)

Add the mashed banana to the cooked apples, mix thoroughly, and set aside.

In a medium sized bowl, mix together the flour, baking powder, baking soda, salt, cinnamon, and nutmeg.

Using a hand or stand mixer, cream together the butter and the sugar.

Beat in the egg and the vanilla flavoring.

Add the flour mixture to the creamed butter mixture and mix until combined.

Fold in the pecans and the cooked apple mixture.

Spray paper liners with cooking spray and fill them ½ to ⅔ full of the muffin batter.

Sprinkle 2 tablespoons of the streusel mixture onto each muffin batter.

Bake in a preheated 350 degree oven for 25-28 minutes or until a toothpick comes out clean.

Cool 5 minutes before removing from the muffin pan.

In a small bowl, combine the flour and the cinnamon and cut the butter into the mixture until it resembles coarse crumbs.

Stir in brown sugar.