In a small bowl, combine ginger, garlic, soy, hoisin, sesame oil, and egg.
In a large bowl, combine the salmon, red onion and 1/4c of the Panko. (Set aside the remaining Panko in a shallow bowl.)
Add the liquid ingredients to the salmon mixture. Shape the salmon into 4 burger patties. Carefully dredge each burger in the remaining Panko.
Cover and refrigerate burgers for at least 1 hour up to 4 hours. 5. Preheat oven to 375 degrees. Heat oil in a non-stick fry pan over medium heat. Fry burgers (don't overcrowd!) 2 minutes on first side, Turn. Fry second side 1 minute. Brush a small amount of Hoisin on the tops of the burgers. 6. Bake in oven for 3 minutes, or until cooked through. If you like your salmon medium rare, only bake for 2 minutes. Serve with buns, lettuce, tomato slices.