Wash cod fillet, dry, drizzle with lemon juice, salt and pepper. Cut off the rough parts with chard, rinse and dry. Pour the white wine in a saucepan. Put it in the chard and cook, covered for 5 minutes. Top with cod fillets, cook for 5 minutes, add sour cream and chopped dill, give a little stew, season with salt, pepper and nutmeg. Serve fish with sauce and chard.