Preheat oven to 425 degrees.
After your tofu is pressed of liquid cut into small pieces.
Into a medium mixing bowl dust the bottom of the bowl with half the cornstarch, garlic powder, onion powder, and salt. Add tofu into the bowl and dust the remaining cornstarch on top. Toss the bowl over and over until the tofu is evenly coated with cornstarch.
Spread evenly on a large baking pan and bake for 30 minutes flipping the tofu pieces half way.