01 - Preheat oven to 375°F.
02 - Boil egg noodles according to package instructions. Drain and set aside.
03 - In a large skillet over medium heat, cook ground beef until browned, breaking it up as it cooks. Drain excess fat.
04 - Add diced onion, minced garlic, and diced bell pepper to the skillet. Sauté for 3 to 4 minutes until vegetables are soft.
05 - Stir in tomato sauce, diced tomatoes with their juices, beef broth, oregano, basil, salt, and black pepper. Simmer for 5 minutes to blend flavors.
06 - Remove skillet from heat. Add cooked noodles and sour cream, stirring until thoroughly combined.
07 - Transfer mixture to a 9x13-inch baking dish. Spread evenly and sprinkle shredded cheddar cheese on top.
08 - Bake uncovered for 20 to 25 minutes, until casserole is bubbly and cheese is melted.
09 - Sprinkle with chopped fresh parsley before serving, if desired.