Cook the peeled potatoes in salted water. Let it steam out well - potatoes from the day before are even better. Cut the cooled potatoes into slices (egg slicer!). Pour the pesto over it and let it soak in a little.
Variant 1: Cut the smoked salmon slices into very fine strips and fold in carefully.
Option 2: Finely dice the smoked pork belly and fry in a pan over medium heat, add the peeled and finely chopped shallot, fry until translucent and fold in the mixture.
Just before serving, add the olive oil and season again with salt and pepper if necessary.