Preheat the oven to 350°F (175°C).
Cook the egg noodles according to package instructions until al dente; drain and set aside.
In a large skillet, cook the ground beef and chopped onion over medium heat until the meat is browned and the onion is translucent, about 7-10 minutes. Drain any excess fat.
In a mixing bowl, combine the sour cream, cottage cheese, 1 ½ cups of the shredded cheddar cheese, tomato sauce, garlic powder, salt, black pepper, and paprika. Mix well.
Add the drained egg noodles and the cooked beef mixture to the cheese mixture. Stir to combine everything evenly.
Grease a 9x13 inch baking dish with cooking spray or butter. Pour the noodle mixture into the baking dish and spread evenly.
Sprinkle the remaining ½ cup of shredded cheddar cheese over the top.
Bake in the preheated oven for 25-30 minutes, or until the cheese is melted and bubbly.
Remove from the oven and let it cool for a few minutes before serving. Garnish with chopped parsley if desired.