In a saucepan put the 3 eggs in their shells and cover with cold water. Bring to the boil and as soon as the water starts to bubble time a further 6 mins
While the eggs are cooking, add the yogurt, mustard and salt & pepper to a mixing bowl and mix. After 6 mins place the eggs in cold water to stop the cooking process
Peel the eggs, and separate the yolks and whites. Add the yolks to the mixing bowl and stir in thoroughly. Roughly chop up the whites of the eggs and combine with the yolk sauce
Toast your sourdough, spread a layer of our Greek style Natural yogurt on the base and start layering your smoked salmon and egg mix on top