Smashburger Tacos with Hoff's Secret Sauce – Hoff & Pepper

Ingredients

• 1 lb lean ground beef
• 1 teaspoon Kosher salt
• 1/2 teaspoon freshly ground black pepper
• 4 (6-inch) flour tortillas
• 4 slices American cheese
• 1/2 cup mayonnaise
• 2 tablespoons Smoken Ghost ketchup
• 1 teaspoon mustard
• 1 tablespoon sweet relish