Charcoal/gas/electric grill: Season the lamb loins with salt, grill over/on a medium heat (approx. 200 °C for approx. 4 mins. on each side. Cover and leave to rest for approx. 5 mins.
Whiskey rosemary butter
Using the whisk on a hand mixer, beat the butter for approx. 2 mins. until light and creamy. Add the whisky and all the other ingredients up to and including the cayenne pepper, serve with the lamb.