Preheat your oven to 350 degrees and spray a large rectangle baking pan with cookie spray.
Finely chop up the onion, add it into a sprayed pan, and sauté over medium until fully cooked.
Remove the onion, place into a bowl, and set aside.
In the same pan that you cooked the onion, cook the ground turkey along with the spices. Refer to the note above to make sure your ground turkey is not dry!
Once the turkey is done cooking, add into the bowl with the onion. Drain the canned corn, and canned beans, and add. Fold together.
Pre measure the sour cream and cottage cheese into separate bowls, this is not necessary, but it will help when it comes time to assemble the casserole.
Spoon some of the ground turkey mixture into the baking pan, just enough to cover the bottom.
Now top with a layer of cottage cheese, and sour cream (do not use all of it, you will repeat this step a few times).
Top with more of the ground turkey mixture, then layer with more of the cottage cheese, and sour cream. Do this until you are out of both.
Top with the fat free cheddar, and bake for 30 minutes.
Serve and enjoy.