Combine water, wine, scallions, and peppercorns in a large skillet. Add salmon and place the skillet over high heat. Bring to a boil, then lower heat and cover. Simmer for 6 minutes, until fish flakes easily.
2.
Whisk together the remaining ingredients in a bowl. Serve fillets with sauce spooned over, garnished by the additional dill sprigs if desired.
