01 -
In a large skillet over medium heat, cook the ground beef or turkey, breaking it up with a spoon, until evenly browned. Drain excess fat from the pan.
02 -
Stir in the chopped onion, bell pepper (if using), and minced garlic. Sauté for 3–4 minutes, until vegetables are tender.
03 -
Blend in ketchup, tomato paste, Worcestershire sauce, mustard, brown sugar, chili powder, salt, and pepper. Mix thoroughly to combine.
04 -
Reduce heat to low and simmer uncovered for 8–10 minutes, stirring occasionally, until the sauce thickens to your desired consistency.
05 -
Lightly butter the cut sides of the hamburger buns and toast them in a skillet or oven until golden.
06 -
Generously spoon the hot mixture onto toasted buns and serve immediately.