"This viral smash burger taco recipe is so irresistible! Two favorite dishes come together in a mashup that's totally over the top!..."
INGREDIENTS
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1/4 cup mayonnaise
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1 tablespoon ketchup
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1 tablespoon mustard
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1 tablespoon relish
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1/2 teaspoon hot sauce
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1 lb ground round
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1 teaspoon Kosher salt
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1/2 teaspoon freshly ground black pepper
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4 (6-inch) flour tortillas
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2 slices American cheese, cut in half lengthwise
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1 cup shredded iceberg lettuce
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1/4 cup diced onion