In a small container, whisk together the mayonnaise, relish, hot sauce, salt, pepper, and liquid smoke (if using). If you want a smooth sauce, blend it. Set aside.

In a medium bowl, mix the ground meat, sugar, soy sauce, ketchup, salt, pepper, paprika, and garlic powder. I do this with my hands (wearing disposable gloves).

Working with one tortilla at a time, place a mound of the meat mixture (about 1/4 cup) in the center and press down so that the meat covers the entire tortilla. Press extra firmly around the edges.

Heat a griddle or a large skillet and drizzle oil onto it. When the pan is hot and the oil is shimmering, begin cooking the tortillas: In one swift motion, flip the tortilla onto the

griddle/skillet so the meat faces down. Cook two to three minutes, until the meat is cooked through. Using a wide spatula, carefully flip and cook another one to two minutes, until golden.

Top with smash sauce, lettuce, tomatoes, pickles, red onions, and caramelized onions (if using).