In medium bowl, stir together cornmeal, oregano, thyme, paprika, onion powder, garlic powder, cayenne pepper, salt, and pepper.
Very generously coat the bottom of a large skillet with oil (at least ⅛ inch deep) and place over medium heat.
Add a few tofu cubes to the cornmeal mixture and gently toss until they're very well coated on all sides.
When the oil is hot, add the tofu cubes to skillet in a single layer. Only add as many as you can fit without crowding.
Cook the tofu until lightly browned and crisp on bottoms, about 4-5 minutes. Flip and repeat on opposite sides.
Transfer the tofu to a paper towel-lined plate. Repeat until all tofu cubes are coated and cooked, adding oil to skillet between batches if needed.