In a large skillet over medium heat, add the ground beef. Cook until browned, stirring occasionally to break it up, about 7-10 minutes.

Once the beef is cooked, drain the excess fat from the skillet.

Add the diced onion to the skillet with the beef and cook for about 3-4 minutes until the onion is soft.

Pour the Manwich sauce over the beef and onions, stirring to combine.

Add the Worcestershire sauce and stir. Reduce heat to low and let everything simmer for about 5 minutes.

Taste and season with salt and pepper as needed.

Divide the sloppy joe mixture among the hamburger buns and serve.