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 to 15 minutes.
03 - Cut pressed tofu into ¾-inch cubes.
04 - In a large bowl, gently toss tofu cubes with cornstarch, oil, sea salt, and black pepper until evenly coated.
05 - Arrange tofu cubes in a single layer on the baking sheet and bake for 25 to 30 minutes, flipping halfway through, 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, adjusting water to desired consistency.
07 - Transfer baked tofu to a large bowl, pour over sesame peanut sauce, and gently toss to coat evenly.
08 - Serve immediately, topped with toasted sesame seeds, sliced green onions, and chili if desired; accompany with rice, noodles, or vegetables.