Preheat oven to 375 degrees F. Grease a 9 x 13 inch casserole dish with butter or baking spray.
Bring a large pot of salted water to a boil. Cook the noodles for 4 minutes, then drain and set aside.
In a large mixing bowl, Whisk together the butter, cottage cheese, sour cream, sugar, eggs, and cinnamon. Stir in the noodles, raisins and chopped apples.
Prepare the topping: in a small bowl, combine the sugar, cinnamon and salt using a fork.
Pour filling into the prepared casserole dish, and top evenly with the cinnamon sugar mixture.
Bake until custard is set and top is golden brown, approximately 40 to 45 minutes.