Prepare the Kung Pao sauce by stirring all the sauce ingredients together in a bowl until the sugar and cornstarch are dissolved. Set aside.
Heat a wok or large skillet over high heat until a drop of water sizzles and evaporates on contact. When hot enough, add bacon and cook until crisp on the outside and cooked through, about 3 to 4 minutes. Transfer cooked bacon to a paper towel-lined plate.
Drain all but 1 tablespoon of bacon grease from the wok or skillet. Add chilis and stir-fry for about 30 seconds, until the oil becomes fragrant and the chilis have begun to blacken.
Add scallion whites, garlic and ginger and stir-fry for about 30 seconds. Add the red bell pepper and stir-fry for another 30 seconds. Add bacon back to the wok or skillet. Pour in the Kung Pao sauce and mix to coat the other ingredients. Stir in peanuts then transfer to serving plate and garnish with scallion greens on top.
This dish is delicious served over a bowl of steaming rice.
Season pork slivers with ¾ teaspoon of salt and the pepper and set aside.
Set a large pot over medium-high heat and add the sesame oil.
Once oil starts to shimmer, add the slivers of pork tenderloin. Cook until the pork is browned, 1½ to 2 minutes. Use tongs to turn the pork over and brown the other side, about 1 minute more. Transfer to a plate and set aside.
To the pot, add the sliced scallion whites and cook, stirring often, until soft, for 1 to 1½ minutes. Stir in the garlic, and once fragrant, after about 30 seconds, stir in the gochujang, gochugaru and tofu.
Add the kimchi, water, rice vinegar, soy sauce and remaining 1½ teaspoons of salt, bring to a simmer and reduce the heat to medium-low.
Simmer 20 minutes, return the pork to the pot and simmer for 1 minute more. Serve the soup in bowls sprinkled with the sliced green scallions with a heaping addition of steamed white rice.
Kimchi, gochujang and gochugaru are available in many supermarkets' international sections or at a local Korean or Asian grocer.