In a small bowl, combine the cornstarch and water and stir until dissolved. Whisk in the sesame oil, ginger, garlic, chicken stock, mirin, and soy sauce and set aside.
Heat a large cast iron pan (at least 12” diameter) over medium-high heat. Add the canola oil and the pork, and season with the salt. Break up and allow to brown undisturbed 3-4 mins at a time, continuing to break up as the meat browns. When well browned and cooked throughout, transfer to a plate or bowl.
Fry the eggs in the cast iron pan to desired doneness, and transfer to a plate.
Add the scallions, cabbage, and kimchi to the pan, and cook while stirring until bright green, slightly wilted, and crisp-tender, about 3-4 minutes.
Add the sauce and the noodles to the pan and toss to coat with tongs. Cook while tossing, until the noodles are heated through.
Serve immediately, topped with the pork, fried eggs, and toasted sesame seeds.