Heat the neutral oil in a large skillet or wok over medium-high heat. Add the garlic and cook for about 30 seconds, until fragrant.
Add the ground pork and season with soy sauce and black pepper. Cook for 2–3 minutes, breaking the pork into small pieces, until browned and cooked through.
Add the diced eggplant and stir-fry for 4–5 minutes, or until tender but still holding its shape. Add a splash of water if the pan becomes too dry.
Add the chopped kimchi and gochujang, if using. Stir-fry for another 1–2 minutes, just until the kimchi is heated through and everything is well combined.
Turn off the heat and drizzle with sesame oil. Taste and adjust the seasoning if needed.
Arrange the tortilla chips on a serving platter. Spoon the warm kimchi, pork, and eggplant mixture over the chips.
Sprinkle with toasted sesame seeds and sliced scallions. Serve immediately while the chips are still crunchy.