Rinse short ribs in cold water, pat dry and place in a wide shallow bowl. In another bowl, mix together soy sauce, brown sugar, rice wine, sesame oil, black pepper and cayenne.
Step 2
Put onion, garlic, pear and ginger in the work bowl of a food processor. Grind ingredients to a smooth purée, then add to soy sauce mixture. Add sesame seeds. Thin with ¼ cup water. Pour marinade over short ribs and mix well. Cover and refrigerate for at least 2 hours, or overnight. Bring to room temperature, drain and discard marinade.
Step 3
Cook short ribs on a hot grill or under the broiler for 2 to 3 minutes per side, until nicely browned but juicy. Pile grilled meat on a platter and serve immediately with lettuce leaves on the side. Accompany with sliced hot peppers, ssamjang and steamed rice, if desired.