Add ground beef, onions, and green pepper to a large pot. Cook over medium heat, stirring occasionally, until beef is no longer pink and vegetables are softened. Drain excess grease.
Stir in ketchup, brown sugar, and Worcestershire sauce.
Stir in beef broth and crushed tomatoes.
Bring to a simmer over medium-high heat. Reduce heat to medium-low and cook, uncovered, stirring occasionally for 20 minutes. Serve hot.
Notes
Thickness: This soup is thick, like a spaghetti sauce. Add a splash of broth or water if you’d like it thinner.
Storage: Store leftovers in a covered container in the fridge for up to 4 days. The soup thickens overnight, so thin it with broth or water when you reheat it.
Freezing: Cool completely, then freeze for up to 3 months. Thaw overnight in the fridge.
Slow cooker: Brown the beef, onion, and green pepper, then drain the grease. Then add everything to the slow cooker and cook on low for 4 to 6 hours or on high for 2 to 3 hours.
Garnish: Fresh parsley is optional. I add it for color.