Preheat oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3). Line two baking trays with baking paper. Coarsely grate parmesan. Sprinkle 4 circles (each approx. 8 cm Ø) on each baking tray made of parmesan.
Bake in the oven for 7-10 minutes until the parmesan has melted.
Allow the parmesan circles to cool very briefly so that they can still be bent up at the sides to form taco shells. Leave to cool completely.
Wash the dill, dab dry and cut finely. Mix mustard, honey and dill. Wash rocket and shake dry. Put a slice of salmon and rocket in each taco shell. Add honey-mustard sauce.