Place a 10 or 12 inch stainless steel or cast-iron skillet over high heat. Drizzle in the oil and swirl to coat. When the oil is shimmery and the pan is too hot to comfortably hold your hand a couple of inches from the surface, scatter in the ground pork.
Sprinkle the salt, pepper, grated ginger, and chili flakes over the pork, then use a flexible, heat-proof spatula to press and spread the pork into a patty that covers the surface of the pan, if possible.
Let it fry, undisturbed for 4 minutes. After 4 minutes, use your flexible spatula to lift the corner of the pork patty. It should come away from the surface of the pan easily and be deeply browned and crisp looking. If not, fry for another minute or so, checking it often.
When it is deeply browned, flip it over in as few pieces as you can. It may break up as you do this, but it should be in big pieces. Fry for another 2 minutes, then begin breaking it up into bite sized pieces with your spatula. When it is fully broken up, transfer to a plate.
Return the heat to the pan, add the bell pepper, white part of the green onions, and sliced garlic to the pan. Stir-fry for about 1 minute, or until the bell pepper strips are crisp tender. Transfer these to the plate with the crispy pork.
Return the pan to the heat one more time and add the rice wine vinegar, soy sauce, sriracha or chili garlic sauce, sesame oil, and honey or sugar to the pan and stir, bringing it to a hard boil. As it boils, scrape the pan to release any delicious browned bits stuck to it.
Let it boil no more than 1 minute, adding in the noodles, crispy pork, and stir fried vegetables, and green portions of the green onions all at the same time, tossing to coat and distribute everything.
Remove the pan from the heat, garnish with additional green onions and sesame seeds, if desired. Serve immediately.
Store leftovers in a tightly covered container in the refrigerator for up to 3 days. Leftovers are delicious cold or reheated.