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