Mix the pork in a bowl. Add the salt to the bowl. Mix until the salt is evenly distributed. Allow the pork to marinate on the counter for at least 10 minutes.
While the meat rests on the counter prepare your dredging station by preparing three separate bowls. Add 1/2 c (62.5 grams) cornstarch to the first bowl.
Add the egg to the second bowl and gently beat it with a fork or a whisk.
Combine the remaining cornstarch, all-purpose flour, salt, and the other ingredients in the last bowl.
To make the pork cubes whiter, first dip them in the cornstarch. Next, cover them with the starch completely. Continue the process for the remaining meat. Let the cornstarch-covered meat rest for 5 minutes on the cooling rack before you move on. This helps to absorb excess water from the meat, and the batter sticks better to it.
Next, take the pork cubes and cover them in cornstarch. Dip them into the beaten eggs and then immediately cover them with cornstarch and all purpose flour mix (the contents from the third bowl). Then place it on a cooling rack. Repeat with the remaining pieces. Allow all meat to rest covered in dredging for at minimum 10 minutes so that the crust can stick to it.
While your pork dredging is taking place, heat your frying pan. Add enough vegetable oil to a heavy-bottomed saucepan over medium heat. Heat the oil to 375°F.
First fry After resting, carefully lower the pieces of pork into the oil. Fry for approximately 2 minutes per batch. Turn them occasionally to ensure even cooking. Don't crowd the pot with too many pieces. I usually add 5 to a batch. The instant-read thermometer will tell you when the pork is pale and reaches 145 degrees F in the middle. The crust should be lightly crispy. Transfer the fried crust to a clean, paper towel-lined cooling rack. Continue to fry the remaining pork. Left: Pork fried once; right: Pork fried twice
Second fry: Place the fried pork pieces back in the oil. Continue to fry for approximately 2 minutes, or until they are light brown and about 200 degrees F. After you take them out of the oil, their color will become slightly darker. Place them back on the cooling rack after you have removed them from the oil. Continue to fry the remaining meat until it is fully cooked.