01 - Set oven to 350°F and allow to fully preheat before baking.
02 - In a large skillet over medium heat, cook ground beef until thoroughly browned. Drain excess fat.
03 - Add chopped onion and minced garlic to the beef; sauté until softened, about 2 to 3 minutes.
04 - Incorporate diced tomatoes with juices, tomato sauce, tomato paste, Italian seasoning, salt, and pepper into the skillet. Simmer for 10 minutes to meld flavors.
05 - While sauce simmers, cook egg noodles in a large saucepan of boiling water according to package directions until al dente. Drain well.
06 - In a medium mixing bowl, combine sour cream and cottage cheese until smooth.
07 - Lightly grease a 9x13 inch casserole dish. Layer half the noodles, followed by half the sour cream-cottage cheese mixture, then half the beef mixture. Repeat the layering sequence.
08 - Sprinkle shredded cheddar cheese evenly over the layered casserole.
09 - Place casserole uncovered in preheated oven and bake for 25 to 30 minutes, until top is golden and bubbling.
10 - Allow casserole to rest for 10 minutes prior to serving.