In a large skillet over medium heat, add the ground hamburger meat, cooking it for about 5-7 minutes. Use a spatula to break up the meat as it sizzles, stirring occasionally.

Once the meat is browned, stir in the chopped onion and green bell pepper. Continue to cook for an additional 3-5 minutes until the vegetables become tender and translucent.

Lower the heat slightly and pour in the ketchup, Worcestershire sauce, brown sugar, and garlic powder. Mix everything thoroughly and allow the mixture to simmer for about 10 minutes.

Taste the mixture and season it with salt and pepper to your liking before serving on hamburger buns.