To make the Mint Pesto, place all the ingredients in a food processor and blitz until smooth.
Drizzle the lamb with the oil and season with the garlic salt and pepper.
Heat a large pan or barbeque grill over a medium heat and fry the lamb until it is browned all over and cooked to your liking (the timing will depend on the thickness of your lamb). Transfer to a warm plate and leave to rest for 5 minutes.
Serve the lamb on a bed of Mint Pesto.
A Table at Tangleby
In this exceptional book, it shares more than 170 delicious dishes, from simple snacks to dinner parties that are guaranteed to impress your guests.