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Ingredients
- 1 pound lean ground beef
- ¼ cup chopped onion
- ¼ cup chopped green bell pepper
- ¾ cup ketchup, or to taste
- 1 tablespoon brown sugar, or to taste
- 1 teaspoon yellow mustard, or to taste
- ½ teaspoon garlic powder
- salt and ground black pepper to taste
- 6 hamburger buns, split
