Coat a saute pan with canola oil and saute galangal, onion, chiles, lemon grass and kaffir until soft about 5 minutes. Add shiitakes and cook 3 minutes. Season and deglaze with fish sauce. Let reduce by 50 percent then add chicken stock. Simmer and reduce by 20 percent. Add juice and check for seasoning. Add noodles, basil and scallions to heat. Meanwhile, preheat skillet and coat with oil. Season scallops with salt and chile powder. Pan sear both sides brown, about 3 minutes a side.
PLATING Ladle broth (lemon grass, kaffir and all) and top with 3 scallops. Garnish