01 - Set oven temperature to 375°F and allow to fully preheat.
02 - Cook egg noodles in a saucepan according to package instructions. Drain thoroughly and set aside.
03 - In a large skillet over medium heat, cook ground beef until fully browned. Drain excess fat from skillet.
04 - Add diced onion, minced garlic, and bell pepper to the browned beef. Sauté for 3 to 4 minutes until vegetables are softened.
05 - Incorporate tomato sauce, diced tomatoes with juices, beef broth, dried oregano, dried basil, salt, and black pepper. Stir well and simmer mixture for 5 minutes.
06 - Remove skillet from heat. Fold in cooked noodles and sour cream, mixing until the ingredients are thoroughly combined and coated.
07 - Transfer the beef and noodle mixture into a 9x13-inch baking dish. Spread evenly across the dish.
08 - Sprinkle shredded cheddar cheese evenly over the surface. Bake uncovered for 20 to 25 minutes, or until casserole is bubbly and cheese is melted.
09 - Remove dish from oven. Garnish with chopped fresh parsley before serving if desired.