Mix the couscous and salt in a bowl. Pour boiling water over the couscous, cover and leave to absorb for approx. 5 mins. Separate with a fork.
Season the salmon. Heat the oil in a non-stick frying pan, fry the salmon on all sides for approx. 2 mins.
Combine the vinegar, olive oil and pesto, season. Mix the couscous, salmon, fennel and pesto.