In a bowl, combine pork chunks with soy sauce and white pepper.
Stir to combine and place into the fridge to marinate for at least 1 hour.
Add 1 beaten egg to the pork and mix ½ C to ¾ C of all-purpose flour to coat the pork pieces.
Fry the pork:
Heat up a wok or large pot with peanut oil over medium high heat.
Once the oil temperature reaches 350°F/177°C, add in the pork pieces and fry in batches, until crispy and golden brown, about 6-7 minutes.
Remove the fried pork and place onto a baking sheet lined with paper towel.
Repeat with the remaining pork.
Fry the aromatics:
Drain and remove excess oil from the wok, leaving approximately 1 tablespoon of oil.
Heat the wok over medium heat and add in the onion.
Sauté, stirring the mixture constantly, for about 1-2 minutes.
Transfer the fried pork into the wok and add in the garlic, red and green bell peppers, chili (if using), salt and pepper and continue to toss to combine.