In a large resealable plastic bag, combine beef with garlic, pear, green onions, soy sauce, sugar, sesame oil, rice wine, sesame seeds, fresh ginger, and ground black pepper. Seal, and refrigerate for 2 to 3 hours.
Preheat the oven's broiler and set the oven rack about 6 inches from the heat source. Brush oil over grill pan. Place beef on pan. Cook, turning to brown evenly, for 3 to 6 minutes, or until done.