01 - Preheat oven to 350°F.
02 - In a large skillet over medium heat, cook the ground beef until well browned. Drain off any excess fat.
03 - Add chopped onion and minced garlic to the skillet. Sauté until onions are softened, about 2 to 3 minutes.
04 - Stir in diced tomatoes, tomato sauce, tomato paste, Italian seasoning, salt, and black pepper. Simmer the mixture for 10 minutes.
05 - Meanwhile, cook egg noodles in a large saucepan as directed on the package until al dente. Drain thoroughly.
06 - In a mixing bowl, combine sour cream and cottage cheese until well blended.
07 - Grease a 9x13 inch casserole dish. Layer half of the cooked noodles, half of the sour cream-cottage cheese mixture, and half of the beef mixture. Repeat with remaining noodles, dairy mixture, and beef mixture.
08 - Sprinkle shredded cheddar cheese evenly over the top layer.
09 - Bake uncovered for 25 to 30 minutes, until the top is golden and the filling is bubbling.
10 - Allow casserole to rest for 10 minutes before serving to ensure clean portions.