In a large skillet over medium heat, cook the ground beef, onion, garlic, Worcestershire sauce, chili powder and pepper until the beef is browned and the vegetables are soft.
Stir in the tomato sauce and simmer for 10 minutes.
Divide the mixture between the hamburger buns and serve.
Interesting Facts
Sloppy Joes were created in the 1930s in Sioux City, Iowa.
The original name for the dish was "loosemeats" sandwiches.
The dish is popular in the United States, and is often served in school cafeterias.