In a large skillet over medium heat, add the ground hamburger meat and cook for about 5-7 minutes, breaking it apart with a spatula until fully cooked.

Stir in the chopped onion and diced green bell pepper. Cook for an additional 3-5 minutes until tender and translucent.

Reduce heat to low and add ketchup, Worcestershire sauce, brown sugar, and garlic powder. Mix well and let simmer on low for about 10 minutes.

Season the mixture with salt and pepper to taste. Serve on hamburger buns.