INGREDIENTS
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8 tablespoons butter
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2 garlic cloves, finely minced
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2 teaspoons onion powder
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1 teaspoon pepper
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1/2 teaspoon salt
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2 teaspoons soy sauce
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4 1/2 pounds 90% lean ground sirloin
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8 hamburger buns
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4 tablespoons tomato paste
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1 1/3 cups beef broth
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2/3 cup raisins
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4 tablespoons soy sauce
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4 tablespoons Dijon mustard
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4 tablespoons balsamic vinegar
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2 tablespoons Worcestershire sauce