Put wine into a medium skillet. Add salmon, and cover with lid. Poach salmon over medium-high heat until it is opaque, 6 to 8 minutes.
Remove from heat. Let salmon cool completely in poaching liquid. Transfer salmon to a plate. skin. Using a fork, flake salmon into large pieces.
Stir together cheese, smoked salmon, scallion, lemon zest and juice, mustard, and salt in a bowl; season with pepper. in flaked salmon. Serve dip with endive leaves. Dip can be refrigerated in an airtight container up to 1 day.