01 - Preheat oven to 375°F.
02 - Prepare egg noodles according to package directions. Drain and set aside.
03 - In a large skillet over medium heat, brown ground beef, breaking up with a spoon as it cooks. Drain excess fat.
04 - Add diced onion, minced garlic, and bell pepper to skillet. Sauté for 3 to 4 minutes until vegetables are softened.
05 - Stir in tomato sauce, diced tomatoes with juices, beef broth, oregano, basil, salt, and black pepper. Simmer mixture for 5 minutes.
06 - Remove skillet from heat. Add cooked noodles and sour cream, mixing thoroughly to coat evenly.
07 - Transfer beef and noodle mixture into a 9x13-inch baking dish. Distribute shredded cheddar cheese uniformly over the top.
08 - Bake uncovered for 20 to 25 minutes, or until the casserole is bubbly and cheese is melted.
09 - Garnish with chopped fresh parsley just before serving, if desired.