1. In a large skillet over medium-high heat, cook the ground beef, onion, and bell pepper for about 5 minutes, or until the beef is cooked through.

2. Drain any excess grease from the skillet.

3. Add the ketchup, Worcestershire sauce, brown sugar, garlic powder, chili powder, salt, and pepper to the skillet and stir to combine.

4. Reduce the heat to low and simmer for 10 minutes, stirring occasionally.

5. Serve the Sloppy Joe mixture on toasted hamburger buns.