Place steamer basket on a plate (to catch any drippings). Mix ginger, soy sauce, garlic, dark brown sugar, and chili flakes. Rub fish fillets with mixture and place in refrigerator to marinate for approximately 30 minutes. Add brown rice and water. Cook rice for approximately 30-35 minutes then remove the lid and add steamer basket with salmon filets. Cover and cook for an additional 8-10 minutes or until salmon flakes easily with a fork. Serve salmon over rice and sprinkle with green onion. Serves 2