In a medium bowl, whisk together soy sauce, brown sugar, pear, garlic, mirin, sesame oil, ginger, sesame seeds and green onions.
In a gallon size Ziploc bag or large bowl, combine soy sauce mixture and short ribs; marinate overnight, turning the bag occasionally.
Preheat grill to medium high heat. Add short ribs to grill and cook, flipping once, until desired doneness is reached, about 2-3 minutes on each side.
Serve immediately.
Notes
*Korean-style short ribs can be found at most Asian markets. The cut, also known as “flanken,” refers to a strip of beef cut across the bone from the chuck end of the short ribs, resulting in a thin strip of meat, about 8-10 inches in length, with 1/2-inch thick rib bones lined on one side.