Step 1

In a large skillet over medium heat, add the ground beef, chopped onion and green bell pepper.

Step 2

Break apart the beef with a wooden spoon as it cooks, until the beef is browned and the vegetables are soft, about 5 minutes. Drain any excess fat from the skillet.

Step 3

Add the ketchup, water, Worcestershire sauce, brown sugar, mustard, garlic salt and pepper to the skillet with the beef and vegetables.

Step 4

Stir to combine all the ingredients, making sure the beef mixture is well coated with sauce.

Step 5

Reduce heat to low and let the mixture simmer for 20 minutes, stirring occasionally, until the flavors are blended together and the sauce has thickened.

Step 6

Serve hot on hamburger buns.