Grate the feta or crumble it very finely and mix it with the crème fraîche, mustard and dill.
Briefly heat the Dürüm flatbread (50 ° C, approx. 2 minutes) and spread it thinly with 2/3 of the cream. Spread the smoked salmon evenly on the cream and spread the rest of the cream on the salmon. Wrap the plate tightly into a roll. Cut off the ends of the roll and, depending on the serving shape, cut the roll into slices (at least 0.5 cm, e.g. on a starter spoon) or wider pieces. This works best with a tomato knife.