Preheat the oven to 375. I recommend using a glass or ceramic dish to bake this in, however if you are using a dark non-stick coated metal, you will want to reduce it to 350.
Chop the cinnamon rolls into 6-8 pieces each. You could go even smaller if you want, but a minimum of 6-8 is a good start for bite sized.
Open the can of apples and chop them up into small bite sized pieces. Open the top of the can all the way up, then run a long sharp knife through the apples inside the can several times to chop them up right inside the can. As you pour them out later, you can chop any you may have missed as they are added.
Place the cinnamon rolls, apples, melted butter, sugar and cinnamon in a bowl and mix them until everything in combined and the cinnamon rolls are coated in the apple mixture.
Spray a large casserole dish with cooking spray. Pour the cinnamon rolls and apples into the dish and use a spatula to make sure it is evenly distributed in the dish. Place in the middle rack of the oven and bake for 40-50 minutes or until cooked through.
Drizzle the glaze from the cinnamon rolls over the top of the casserole. Serve warm and enjoy!