Press the tofu for 15 minutes. Use a tofu press or wrap the tofu block in a paper towel and place it between 2 flat surfaces with something heavy on top.
In a shallow bowl or baking dish, combine the lemon juice and zest, soy sauce, maple syrup, nutritional yeast, oregano, garlic powder, and lemon pepper seasoning.
Cut or tear the tofu into bite-sized pieces (about 1 x 1 inches) and add it to the dish with the marinade.
Toss the tofu cubes until they are completely covered with the marinade. Marinate for 1 hour or overnight.
Preheat the oven to 400° F (200° C). Line a baking sheet with parchment paper. (See note 3 for Air Fryer instructions)
In a small dish, combine the cornstarch, panko, and ½ teaspoon salt. Drain any excess marinade from the tofu dish, then add the panko mixture and toss to coat the tofu on all sides. Spoon on any lemon zest or spices from the bottom of the dish over the top of the cubes.
Add the tofu to the baking sheet, separated, in a single layer. Bake for 15 minutes, then flip the tofu cubes and bake for 10-15 minutes until the tofu is firm and slightly browned.