01 - Set oven to 425°F and line a baking sheet with parchment paper.
02 - Wrap tofu in a clean kitchen towel, place a heavy object on top, and drain excess moisture for 10–15 minutes.
03 - Cut the pressed tofu into 3/4-inch cubes.
04 - In a large bowl, toss tofu cubes with cornstarch, oil, sea salt, and black pepper until evenly coated.
05 - Arrange tofu cubes in a single layer on the prepared baking sheet and bake for 25–30 minutes, flipping halfway, until golden and crisp.
06 - Whisk together peanut butter, soy sauce, sesame oil, rice vinegar, maple syrup, sriracha (if using), and warm water until smooth; adjust water for desired consistency.
07 - Transfer crispy tofu to a large bowl, pour sauce over, and gently toss to coat evenly.
08 - Serve immediately, garnished with toasted sesame seeds, sliced green onions, and optional red chili, alongside steamed rice, noodles, or vegetables.