01 - Whisk together flour and salt in a bowl. Create a well in the center, add eggs, and pour in half the milk. Whisk gently to combine, then add remaining milk and melted butter. Mix until smooth and let rest for 10 minutes.
02 - Heat a 9-inch non-stick skillet over medium heat. Lightly grease with butter or oil. Pour about ¼ cup batter, swirling to coat the pan evenly. Cook for 1-2 minutes until golden underneath, flip, and cook for 30 seconds. Stack finished crepes on a plate and cover to keep warm. Repeat with remaining batter.
03 - Combine cream cheese, sour cream, dill, chives, lemon juice, and black pepper in a small bowl. Mix until smooth and creamy.
04 - Spread a thin layer of herbed cheese filling over each crepe. Arrange smoked salmon slices evenly over the filling.
05 - Roll up each crepe or fold into quarters. Arrange on a serving platter. Garnish with extra herbs and lemon wedges. Serve immediately.