01 - Cut the pressed tofu block into 8 thin, even slices approximately 1/4 inch thick for optimal marinating and cooking.
02 - Whisk together soy sauce, olive oil, maple syrup, smoked paprika, liquid smoke, garlic powder, onion powder, and black pepper in a shallow dish until fully combined.
03 - Place tofu slices in the marinade, turning to coat all surfaces. Let marinate for at least 15 minutes, turning once halfway through to ensure even flavor absorption.
04 - Heat a nonstick skillet or grill pan over medium heat. Cook marinated tofu slices for 3-4 minutes per side until golden brown with slightly crispy edges.
05 - Toast bread slices until lightly golden. Spread vegan mayonnaise evenly on one side of each slice while bread is still warm for better coverage.
06 - Layer ingredients in order: lettuce leaves on bottom, followed by tomato slices, smoky tofu, and red onion if desired. Top with remaining bread slices.
07 - Slice each sandwich diagonally in half and serve immediately while tofu is still warm and bread maintains crispness.