Cook the EggsPlace eggs in a small pot, cover with water, and bring to a boil. Turn off the heat, cover, and let sit for 7–8 minutes.
Cool and PeelDrain and place the eggs in ice-cold water for 2 minutes. Refresh with more ice if needed. Peel once cool.
Separate Yolks and ChopHalve the eggs. Remove yolks from 4 eggs and place in a bowl. Finely chop the remaining 2 whole eggs and all egg whites.
Make the DressingMash the reserved yolks with yogurt, mayonnaise, Dijon mustard, and lemon juice until creamy but slightly textured.
Mix the SaladIn a large bowl, combine chopped eggs, salmon, smoked salmon, chives, dill, and the creamy dressing. Season with salt and pepper. Stir well to combine.
Chill and ServeRefrigerate for 30 minutes before serving for best flavor. Enjoy as a sandwich filling, on toast, or over a fresh bed of greens.