Step 1

In a food processor, combine gochujang, Asian pear, garlic, ginger, soy sauce, sesame oil, sugar, rice wine, and gochugaru and process until a smooth marinade forms.

Step 2

In a large bowl, toss pork with marinade, cover with plastic, and refrigerate for at least 2 and up to 8 hours.

Step 3

When ready to cook, heat 1 tablespoon oil in a wok over high heat until smoking. Add onion, scallion, and green chili pepper, and cook, stirring and tossing occasionally, until softened and starting to brown around the edges, about 3 minutes. Transfer to a platter.

Step 4

Heat 1 more tablespoon oil in the wok until smoking. Add kimchi and cook, stirring and tossing occasionally, until heated through and excess liquid has evaporated, about 2 minutes. Transfer to the platter with the onions.

Step 5

Working in 4 batches, heat remaining oil in wok until smoking. Add pork and stir-fry until just cooked-through and starting to brown in spots, then transfer to platter. Return all ingredients to wok and cook, tossing and stirring, until heated through. Season with salt, transfer to a serving platter, and sprinkle with sesame seeds. Serve right away with lettuce leaves and rice.