01 - Set oven to 375°F (190°C).
02 - Cook egg noodles in a large pot of boiling water according to package instructions. Drain and set aside.
03 - In a large skillet over medium heat, cook ground beef until browned throughout. Drain off excess fat.
04 - Add diced onion, minced garlic, and diced bell pepper to the skillet. Sauté for 3 to 4 minutes, stirring occasionally, until vegetables begin to soften.
05 - Stir in tomato sauce, diced tomatoes with juices, beef broth, dried oregano, dried basil, salt, and black pepper. Simmer for 5 minutes to blend flavors.
06 - Remove skillet from heat. Fold in the cooked egg noodles and sour cream until thoroughly mixed.
07 - Transfer the noodle and beef mixture into a 9x13-inch baking dish, spreading evenly. Sprinkle shredded cheddar cheese in a single layer over the top.
08 - Bake uncovered for 20 to 25 minutes until casserole is bubbling and cheese has melted.
09 - Scatter chopped fresh parsley over the surface before serving, if desired.