"The meeting of two sandwich greats...."
INGREDIENTS
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1 lb lean ground beef
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1/2 teaspoon garlic powder
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2 tablespoons butter
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1 small yellow onion, diced
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1 green bell pepper, seeded and diced
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2 tablespoons ketchup
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1 tablespoon Worcestershire sauce
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1 tablespoon cornstarch
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1 cup beef broth
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8 oz provolone cheese slices
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6 hamburger buns
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Kosher salt and freshly ground black pepper, to taste