Whisk together the oil and harissa, season. Coat the salmon in the mixture. Heat a dash of oil in a non-stick frying pan. Fry the salmon for approx. 4 mins. on each side. Remove, roughly pull apart with a fork. Fry the nuts and sage in the same pan for approx. 2 mins.
Combine the lime zest and juice with the oil, season. Mix in the celery and cherries with the salmon, nuts and sage.