Step #1 Mix together the harissa paste, lemon juice, sliced mint & sea salt.
Step #2 Add the lamb fillets, turning to coat in the mixture, & set aside to marinate for 10 mins or so.
Step #3 Heat a griddle pan for 2-3 mins until hot.
Step #4 Add the lamb fillets & cook for 8 -12 mins until well browned but still a little pink in the centre; remove this from the heat & allow to rest for 5 mins to tenderize the meat.
Step #5 Warm the pittas in the same pan.
Step #6 Cut the pittas in half & fill each pocket with the rocket.
Step #7 Diagonally slice the lamb into 1 cm thick slices & pack into the pittas.
Step #8 Top with a dallop of hummus & serve warm with lemon wedges for squeezing over.