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