01 - Set oven to 425°F and line a baking sheet with parchment paper.
02 - Wrap tofu in a clean kitchen towel and place a heavy object on top. Drain moisture for 10–15 minutes.
03 - Cut drained tofu into 3/4-inch cubes.
04 - Toss tofu cubes gently in a large bowl with cornstarch, oil, salt, and pepper until evenly coated.
05 - Arrange tofu in a single layer on the prepared baking sheet. 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.
07 - Transfer baked tofu to a large bowl, pour sauce over, and gently toss to coat evenly.
08 - Serve immediately topped with toasted sesame seeds, green onions, and sliced chili. Pair with rice, noodles, or vegetables if desired.