Step 1

For the Galbi: Combine onion, Asian pear, garlic, and ginger in the bowl of a food processor and process to a coarse purée, scraping down sides of food processor bowl as needed, about 30 seconds. Stop processor and add soy sauce, water, brown sugar, mirin, and black pepper to food processor bowl. Continue processing until liquids and sugar are well-combined with vegetables, 15 to 30 seconds longer. Transfer mixture to a medium bowl, and stir in scallions, sesame oil, and sesame seeds.

Step 2

Place beef in a gallon zipper-lock bag or large baking dish, and pour marinade over the short ribs. Toss to evenly distribute the marinade, then seal bag, removing as much air as possible (if using baking dish, wrap tightly with plastic wrap). Transfer short ribs to refrigerator, and marinate for at least 1 hour and up to 24 hours.

Step 3

Light one chimney full of charcoal. When all the charcoal is lit and covered with gray ash, pour out and arrange the coals on one side of the charcoal grate. Set cooking grate in place, cover grill, and allow to preheat for 5 minutes. Alternatively, set half the burners on a gas grill to the highest heat setting, cover, and preheat for 10 minutes. Clean and oil grilling grate.

Step 4

Remove short ribs from marinade and wipe off excess. Place directly over the hot side of the grill. If using a charcoal grill, leave uncovered; if using a gas grill, cover. Cook, turning occasionally, until beef is cooked through and lightly charred on both sides, 6 to 8 minutes total (3 to 4 minutes per side). Transfer to a serving platter and allow to rest for at least 2 minutes before serving.

Step 5

For Serving: Serve short ribs immediately with a pair of kitchen shears on-hand for cutting the meat off the bone and into bite-size pieces. Pass ssamjang, lettuces, garnishes, and banchan at the table.