I froze some tofu in the freezer. Poked a small hole and drained the water, and froze it in its container.
Defrosted it, then cut it up into cubes. Squeezed to drain the excess water then soaked it in some soy sauce. It absorbed so much soy sauce, I gently squeezed it before coating it with cornstarch and deep frying it. This actually tasted good on its own.
Stir-fried some bell peppers, carrots, and onions, added the tofu and sweet and sour sauce. The tofu lost its crunch and got a little soft, but it was still pretty good.