Brown the ground beef in a skillet over medium heat.
Add the chopped onion and green bell pepper, cooking until tender.
Drain excess fat from the skillet.
Stir in ketchup, Worcestershire sauce, brown sugar, salt, and pepper.
Simmer the mixture for about 10 minutes.
Toast the hamburger buns lightly.
Spoon the sloppy joe mixture onto the toasted buns.
Top with pickles and onions as desired.
Serve hot and enjoy!