Wash, peel and grate the potatoes. Squeeze out and discard the excess liquid from the potatoes and place into a bowl.
Peel and grate the onion. Add and egg and the grated union to the potatoes and mix.
Bake the rösti mix in a pan with olive oil
Mix the sour cream, chives, lemon zest and some salt and pepper in a bowl
Place a rösti on a plate. Put on some sauce and finish of with some smoked salmon and chives.