01 - Sift flour and salt into a mixing bowl. Create a well in center, crack eggs into well, and gradually whisk in half the milk until smooth. Incorporate remaining milk and melted butter. Whisk until batter reaches silky consistency. Rest at room temperature for 10 minutes.
02 - Heat 9-inch non-stick skillet over medium heat. Lightly coat with butter. Pour ¼ cup batter, immediately tilt and swirl pan to create thin, even layer. Cook 1-2 minutes until edges turn golden and surface sets. Flip carefully, cook 30 seconds. Transfer to warm plate, cover with clean towel. Repeat until all batter used.
03 - Combine softened cream cheese and sour cream in bowl. Fold in chopped fresh dill, chives, and lemon juice. Season generously with freshly ground black pepper. Mix until completely smooth and well incorporated. Refrigerate if not using immediately.
04 - Lay each crepe flat on clean surface. Spread thin, even layer of herbed cheese mixture over entire surface, leaving ½-inch border. Arrange smoked salmon slices in single layer over cheese, covering most of surface.
05 - Roll crepes tightly from one edge to opposite side or fold into quarters. Arrange seam-side down on serving platter. Garnish with additional fresh herbs and lemon wedges. Serve immediately while crepes remain tender and filling is cool.