INGREDIENTS
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1 pound ground beef 80/20
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1 teaspoon kosher salt
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1/2 teaspoon fresh ground black pepper
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4 tablespoons mustard
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8 slices American cheese
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1 large beefsteak tomato
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iceberg lettuce leaves
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white onion slices
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4 hamburger buns
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For the special sauce
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1/4 cup mayonnaise
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2 tablespoons ketchup
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1 tablespoon sweet pickle relish