Preheat oven to 350 degrees F (175 degrees C).

Spray an 8x8 inch baking dish with cooking spray.

In a large mixer, combine the mashed banana and peanut butter.

Add the maple syrup and cinnamon to the mixture.

Mix all ingredients well until thoroughly combined.

Add the rolled oats to the mixture.

Ensure all oats are moistened by the wet ingredients; add more syrup and peanut butter if needed.

Fold in the chopped nectarines, almonds, and dried cherries.

Press the mixture evenly and tightly into the prepared baking dish.

Bake in the preheated oven for 30 minutes, or until the bars are firm and set.

Let the granola bars cool for at least 1 hour before cutting them into squares.

Serve and enjoy!