Begin by freezing the block of tofu overnight to enhance its texture. Thaw completely and press to remove excess moisture.

Combine cornstarch, garlic powder, and salt in a mixing bowl. Cut pressed tofu into cubes and coat evenly in the mixture.

For air frying, preheat the air fryer to 375°F; cook tofu for 18-22 minutes, flipping halfway. For baking, preheat the oven to 400°F and bake for about 25 minutes.

In a saucepan, combine fresh orange juice, soy sauce, and sugar. Heat and stir until the mixture simmers and thickens, about 5-7 minutes.

Toss the crispy tofu in the orange sauce until thoroughly coated. Serve hot, garnished with sesame seeds or green onions.