01 -
Heat a skillet over medium heat and cook ground beef until evenly browned.
02 -
Add diced onions and bell peppers to the skillet and cook until softened.
03 -
Stir in ketchup, Worcestershire sauce, mustard, garlic powder, and ground black pepper.
04 -
Reduce heat and let the mixture simmer for 10 minutes, stirring occasionally.
05 -
Spoon the beef mixture onto burger buns and top with cheddar cheese slices if desired.