This is a recipe that I got a long time ago, and my boyfriend absolutely loves.
Heat a large skillet over medium-high heat. Cook and stir beef in the hot skillet until browned and crumbly, 5 to 7 minutes; drain and discard grease.
Mix ketchup, chili sauce, onion, green bell pepper, brown sugar, and mustard powder into ground beef; bring to a boil. Reduce heat and simmer until flavors have blended, about 15 minutes; serve on hamburger buns.
Per Serving: 349 calories; protein 17.5g; carbohydrates 38.9g; fat 13.9g; cholesterol 46.4mg; sodium 733.3mg.