Preheat oven to 350ºF. Place baguette slices on a medium baking sheet, brush with melted butter, and bake for 8 minutes until toasted. Let cool for 5 minutes.
In a medium bowl, combine chopped eggs, celery, onion, dill, and chives.
In a separate small bowl, mix mayonnaise, rice vinegar, mustard, salt, and pepper until smooth.
Pour mayonnaise mixture over the egg mixture and stir well to combine.
Spoon the egg salad onto cooled baguette slices. Sprinkle with smoked paprika and garnish with fresh dill. Serve immediately.