01 - Preheat oven to 350°F.
02 - In a large skillet over medium heat, cook ground beef until browned. Drain excess fat.
03 - Add chopped onion and minced garlic to the skillet. Sauté until softened, about 2 to 3 minutes.
04 - Stir in diced tomatoes, tomato sauce, tomato paste, Italian seasoning, salt, and pepper. Simmer for 10 minutes.
05 - While sauce simmers, cook egg noodles in a large saucepan according to package instructions until al dente. Drain thoroughly.
06 - In a mixing bowl, combine sour cream and cottage cheese until evenly blended.
07 - In a greased 9x13 inch casserole dish, layer half the egg noodles, then half the sour cream and cottage cheese mixture, followed by half the beef mixture. Repeat the layers.
08 - Evenly sprinkle shredded cheddar cheese over the top layer.
09 - Bake uncovered for 25 to 30 minutes, until the top is golden and the filling is bubbly.
10 - Allow the casserole to rest for 10 minutes before serving.