01 - In a mixing bowl, combine gochujang, soy sauce, brown sugar, sesame oil, minced garlic, grated ginger, rice vinegar, mirin, and black pepper. Whisk until smooth and fully incorporated.
02 - Place the lamb ribs in a large resealable bag or shallow dish. Pour the marinade over the ribs, ensuring every surface is thoroughly coated. Seal tightly and refrigerate for at least 4 hours, or ideally overnight for maximum flavor penetration.
03 - Preheat the oven to 320°F. Remove the ribs from the marinade, reserving any excess. Arrange the ribs on a wire rack set over a baking sheet and cover tightly with aluminum foil.
04 - Roast the covered ribs in the oven for 1 hour. While roasting, pour the reserved marinade into a small saucepan, stir in the honey, and simmer over low heat for 5 minutes to create a thick glaze.
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. Continue roasting uncovered for 10 to 15 minutes until the surface is caramelized and lightly charred.
06 - Remove the ribs from the oven and let them rest for 5 minutes. Squeeze yuzu juice generously over the top of the ribs to finish.
07 - Scatter sliced scallions, toasted sesame seeds, and sliced red chili over the ribs. Cut between the bones into individual ribs and serve immediately.