Bring a large pot of salted water to a boil, and cook the pasta according to the package instructions.
Once cooked, drain the pasta well and add it back to the hot pot.
Add the cottage cheese to the pasta and stir until all of the noodles are well coated.
Add sour cream, if using, and salt and pepper to taste. Stir until well combined.
Serve hot, and if desired garnish the dish with fried onions, parmesan cheese, and/or chopped parsley.