For the sauce, wash the herbs, shake dry. Cut parsley leaves and dill flags from the stems with a knife. Squeeze the orange. Put the herbs, orange juice, mustard, oil and 1 teaspoon sugar into a tall mixing bowl.
Puree with a hand blender. Season to taste with salt and pepper.
Cook the pasta in 3-4 l boiling salted water (approx. 1 teaspoon salt per litre) according to the instructions on the packet. Preheat oven (electric cooker: 100°C/circulating air: 80°C/gas: see manufacturer). Line a baking tray with baking paper and place the salmon on top.
Warm up in a hot oven for 5-8 minutes only.
Clean and wash the courgettes and cut them lengthwise into thin long slices with a peeler. Add to the pasta about 1 minute before the end of the cooking time and cook. Then drain.
Mix pasta with dill sauce. Take salmon out of the oven, chop coarsely and serve with the noodles.