Preheat oven to 350°F.
Bring a large pot of salted water to a boil and cook egg noodles until al dente. Drain and set aside.
Meanwhile, brown the ground beef in a large skillet over medium-high heat.
Drain fat as needed, then add tomato sauce and season with salt and pepper. Reduce to a simmer while you prepare the sour cream mixture.
In a medium bowl, stir together the sour cream and cottage cheese. Season with salt and pepper, then add green onions and stir to combine. Add cooked and drained noodles and stir once more.
Add half of the noodle mixture to a 9x13-inch baking dish. Top with half of the meat mixture, followed by half of the cheese.
Repeat layers -- noodles, meat, then cheese, then bake until cheese has melted, about 20 minutes. Enjoy!
