(1) I used a thick cut of salmon here in order to take better pictures. Personally, I prefer to use a thin cut of salmon belly with more fat.
(2) The burger might be a bit difficult to hand hold with the yogurt sauce. You could serve it in a big plate with the upper bun place next to the salmon, and yogurt sauce in a separated small bowl. You could also add some chopped tomato and cucumber salad aside. Drizzle yogurt sauce on the salmon and the salad while eating.