01 - Preheat the oven to 375°F.
02 - Boil the egg noodles according to package directions. Drain thoroughly and set aside.
03 - In a large skillet over medium heat, cook ground beef until completely browned, breaking it into crumbles as it cooks. Drain excess fat.
04 - Add diced onion, minced garlic, and diced bell pepper to the skillet with the beef. Sauté for 3 to 4 minutes until the vegetables are soft.
05 - Stir in tomato sauce, diced tomatoes with their liquid, beef broth, dried oregano, dried basil, salt, and black pepper. Bring to a gentle simmer and cook for 5 minutes.
06 - Remove skillet from heat. Add cooked noodles and sour cream. Mix thoroughly until well combined.
07 - Spread the mixture evenly in a 9x13-inch baking dish.
08 - Sprinkle the shredded cheddar cheese evenly over the surface.
09 - Bake uncovered in the preheated oven for 20 to 25 minutes, or until the casserole is bubbly and the cheese has melted.
10 - Remove from oven and garnish with fresh chopped parsley before serving, if desired.