To make marinade; simply whisk together the hoisin, black bean,
sesame seeds and chilli sauce into a paste.
Remove skewers from packaging, pat away any juices and season
with sea salt.
Preheat a griddle or heavy-based frying pan, rub the pan with a
little oil then sear the pork on all sides until just cooked for
8-10 minutes, then finish by brushing with the glaze and cook until
rich & sticky.