These BBQ tofu sandwiches are made with slabs of crispy seasoned tofu slathered in sweet and tangy barbecue sauce.
Preheat the oven to 400°F and line a baking sheet with parchment paper.
Slice the tofu block into 6 slabs (Note 2).
Place the tofu slabs into a large mixing bowl and add the cornstarch, oil, soy sauce, apple cider vinegar, liquid smoke (if using), chili powder, and cumin.
Use your hands to mix the ingredients, getting each tofu slab relatively evenly coated.
Place the tofu slabs on the baking sheet.
Bake the tofu for about 30 minutes, until crispy and browned, turning the pieces halfway through.
Remove the baking sheet from the oven. Brush both sides of each tofu piece with barbecue sauce, then return the baking sheet to the oven.
Bake the tofu for 5 minutes more, until the sauce begins to bubble.
Stuff the tofu pieces into buns, topping them with additional barbecue sauce and toppings of choice.
Serve.