01 - In a large mixing bowl, whisk together gochujang, soy sauce, brown sugar, sesame oil, minced garlic, grated ginger, rice vinegar, mirin, and black pepper until a smooth, uniform paste forms.
02 - Place the trimmed lamb ribs in a large resealable bag or shallow dish. Pour the marinade over the ribs, massaging the bag or turning the ribs to ensure every surface is thoroughly coated. Seal tightly and refrigerate for at least 4 hours, or preferably overnight for maximum flavor penetration.
03 - Preheat the oven to 320°F. Remove the ribs from the marinade, reserving all excess liquid. Arrange the ribs on a wire rack set over a rimmed baking sheet. Tent loosely with aluminum foil and roast for 1 hour.
04 - While the ribs roast, combine the reserved marinade and honey in a small saucepan. Simmer over low heat for about 5 minutes, stirring occasionally, until the mixture thickens into a glossy glaze. Remove from heat and set aside.
05 - Increase the oven temperature to 400°F. Remove the foil from the ribs and brush them generously on all sides with the prepared glaze. Return to the oven uncovered and roast for 10 to 15 minutes, until the surface is deeply caramelized with slight charring at the edges.
06 - Remove the ribs from the oven and let them rest for 5 minutes. Squeeze yuzu juice generously over the hot ribs, allowing the bright citrus to mingle with the caramelized glaze.
07 - Scatter sliced scallions, toasted sesame seeds, and sliced red chili over the ribs. Cut between the bones into individual ribs and serve immediately with steamed rice or pickled vegetables.