Combine the brown sugar, soy sauce, and cornstarch/arrowroot starch in a bowl and whisk together. Add the cubed tofu and allow it to marinate for 20-30 minutes.
BAKING THE TOFU
Add the marinaded tofu to a parchment-lined baking sheet and bake for 15-30 minutes, flipping halfway through.
FOR THE GENERAL TSO'S SAUCE
In a saucepan, whisk all ingredients for the General Tso's Sauce together and heat on high for 5 minutes, whisking continuously, until bubbly and thick.
Toss the baked tofu in the sauce and serve.
Notes
*To save, store the leftovers in an airtight container in the fridge for up to a week.*To reheat, I recommend adding the tofu to a hot pan with a few tablespoons of water and heating. But if you must use a microwave, 2 ½ minutes on high should do the trick.