Preheat the oven to 400F and line a baking sheet with parchment.

Toss the cubed tofu with the soy sauce, then sprinkle on the cornstarch and toss to coat.

Spread the tofu in a single layer with space between each piece.

Bake for 25 to 30 minutes, flipping halfway, until golden and crisp on all sides.

Serve hot over rice or in a stir-fry.