Preheat oven to 350 degrees and grease two-three bread loaf pans, depending on size. My pans are 5" by 9". But, I think I should have greased a third pan and not filled the pan all the way. Be sure to only fill your bread pans about 2/3 of the way full, they will definitely rise when baking!
First, mix together all the dry ingredients, except the cinnamon, in a large mixing bowl.
Then, mix all the wet ingredients in another mixing bowl.
Add the wet ingredients to the dry ingredients and mix well. Then, add in you peeled and diced apple as well as the cinnamon. Stir until incorporated.
Pour mixture into greased pans, being sure not to overfill them!
To make the cinnamon sugar swirl topping, simply combine the sugar and cinnamon together in a small bowl. Then, spoon the mixture on top of the bread dough.
Swirl the cinnamon sugar mixture into the bread dough by using a butter knife.
Place in preheated oven and bake for one hour and ten minutes, or until a toothpick inserted into the bread comes out clean.
Serve warm with a slice of butter on top and enjoy!