1. Preheat the oven to 425°F and place parchment paper on a baking pan.
2. Combine the cubed tofu, olive oil, tamari, and sriracha in a mixing bowl. Sprinkle the cornstarch on top of the tofu and toss lightly to coat.
3. On the baking sheet, evenly distribute the tofu. Bake for 20 to 25 minutes, or until the tofu becomes golden brown around the edges. Remove the dish from the oven and serve right away.

The total cooking time for this recipe is 30 minutes including prep time. For more interesting ideas on how to enjoy tofu, see this video recipe.