Freeze the tofu in its packaging for one day.

Thaw the frozen tofu in cold water and prepare it.

Press the tofu with a kitchen towel and plate to remove excess water.

Cut the tofu into bite-sized pieces, resembling sweet and sour pork chunks.

Place tofu pieces in a plastic bag with starch and shake to coat.

Fry the tofu in oil over medium heat until golden brown.

In a pan, combine water, vinegar, soy sauce, sugar, and oyster sauce.

Bring the sauce to a boil and add vegetables as desired.