Preheat oven to 350°F. Butter or spray lightly with cooking spray the casserole dish you will use. Set aside. In a bowl, add the crushed Ritz cracker crumbs and melted butter and mix well to coat the crackers. Set aside.
In the barrel of a food processor or a large mixing bowl with a hand mixer, whip the cottage cheese to a smooth consistency, about 1 minute. (It's okay if a few curds remain, or if you prefer, skip this step altogether; I do this because I find many dislike the texture of cottage cheese.)
To the cottage cheese add the cream cheese, sour cream, cream soup, onion and garlic powder, and curry powder. Pulse or beat until well combined, 30 to 45 seconds. Add the prepared cooked chicken to the soup mixture. If you used a food processor, it may be more helpful to transfer the soup mixture to a large bowl to do this. (If using any casserole add-ins, incorporate them now.) Stir well to combine everything.
Scrape the chicken mixture into the prepared casserole dish and scatter the buttery Ritz cracker topping over the top of the chicken. (If using any Ritz topping add-ins, incorporate them now. For a layer of shredded cheese, add it to the top of the chicken before adding the Ritz topping.) Place into the preheated oven and bake uncovered for 35 to 45 minutes or until bubbling and golden.
Allow the casserole to stand 10 minutes before serving as the contents will be very hot. Garnish with minced fresh parsley, thyme leaves, or chopped green onion if desired. Offer parmesan cheese tableside if desired. Enjoy!