01 - Set oven temperature to 375°F.
02 - Cook egg noodles in a pot of salted boiling water according to the package directions. Drain and reserve.
03 - In a large skillet over medium heat, cook ground beef until browned. Drain excess fat thoroughly.
04 - Add diced onion, minced garlic, and diced bell pepper to the skillet. Sauté for 3 to 4 minutes until vegetables are softened.
05 - Stir in tomato sauce, undrained diced tomatoes, beef broth, dried oregano, dried basil, salt, and black pepper. Let simmer for 5 minutes to allow flavors to blend.
06 - Remove skillet from heat. Add reserved cooked noodles and sour cream to the beef mixture, stirring well to combine.
07 - Spread the mixture evenly in a 9x13-inch baking dish. Distribute shredded cheddar cheese evenly over the top.
08 - Bake uncovered for 20 to 25 minutes, or until the casserole is bubbling and cheese is melted.
09 - Before serving, sprinkle with chopped fresh parsley if desired.