Smash Burger Tacos | Recipe Saver

Ingredients

• 1/4 cup mayonnaise
• 1 tablespoon ketchup
• 1 teaspoon mustard
• 1 tablespoon relish
• 1/2 teaspoon hot sauce
• 1 pound ground round beef
• 1 teaspoon kosher salt
• 1/2 teaspoon black pepper, freshly ground
• 4 (6-inch) flour tortillas
• 2 slices American cheese, cut in half lengthwise
• 1 cup iceberg lettuce, shredded
• 1/4 cup onion, diced