Mix the pork with the marinade. Mix well, cover and refrigerate
450 g of pork tenderloin, 0.5 teaspoon of ginger, 1.5 teaspoon salt, 0.25 teaspoon black pepper
Mix the potato starch with water in a bowl using a spoon. Let it sit on the counter until the starch settles at the bottom of the bowl and solidifies (about 1h30)
200 g potato starch, 750 ml water
Remove the pork from the fridge and mix it with the reserved potato starch
35 g potato starch
Discard the water from the bowl of settled starch (keeping the starch at the bottom).
Add the egg white and mix well
1 egg white
Add the starch/egg white mixture to the pork and gently mix with your hand
Fill a deep pot or fryer with oil and heat until it reaches 165 degrees Celsius
1 L neutral oil
Test the temperature by dipping a piece of pork into the oil; if it sizzles, the oil is ready
Place the pieces of pork in the hot oil, separating them with tongs if they stick together. Fry in batches if necessary, until crispy and golden (about 5 to 7 minutes)
Transfer the pork pieces to a colander placed over a bowl to drain
Reheat the oil and fry the pork a second time, until very crispy and golden brown (about 3 to 4 minutes)
Drain and transfer to a plate
Sauce
In a bowl, mix the sugar, light soy sauce, salt and rice vinegar until the sugar is almost dissolved