1Stir together the vinegar, soy sauce, hot pepper paste, garlic, ginger, red pepper flakes, black pepper, sugar, green onions, and yellow onion in a large bowl. Mix in the pork slices, mixing well until completely coated. Place into a resealable plastic bag, squeeze out any excess air, seal, and marinate in the refrigerator at least 3 hours.
2Heat the canola oil in a large skillet over medium-high heat. Add the pork slices in batches, and cook until no longer pink in the center, and lightly browned on the outside, about 5 minutes per batch. Be careful when cooking the meat, the spicy fumes will hurt your nose!
Footnotes
Tip
Aluminum foil can be used to keep food moist, cook it evenly, and make clean-up easier.