Begin by pressing your tofu in a tofu press or between two weighted plates for a minimum of 30 minutes.
Once pressed, cut your tofu into equally sized 1-inch cubes.
In a medium bowl, mix the cornstarch with the salt and pepper. Dip each piece of tofu into the mixture on all sides and transfer to a plate.
Heat 2 tablespoons of the olive oil over medium-high heat in a large skillet. Fry the tofu in batches until browned and crispy on all sides. This may take 3-4 batches.
Remove the crispy tofu to a paper towel-lined plate.
Meanwhile, in another large bowl, add the remaining 2 tablespoons of olive oil, garlic, ginger, turmeric, and scallions. Mix to combine.
To the same hot pan, add the scallion mixture and cook for 1-2 minutes until fragrant.
Toss the crispy tofu in the warm scallion mixture. Season to taste with additional salt and pepper.
Serve with cooked white rice and tamari, if desired.