Pat dry your pork belly and score both skin side, taking care not to cut the meat, and also the belly side, but not too deep.
On a cooling rack in the sink, pour boiling water over the skin side of your belly.
Combine all ingredients above for the herby stuffing in a large bowl.
Rub stuffing into and onto the meat side of your pork belly.
Roll and tie your porchetta.
Place into fridge overnight.
Remove from the fridge and rub olive oil and flaked sea salt over the skin and into score marks.
Light charcoal using a chimney.
Set porchetta onto rotisserie.
Cook porchetta over charcoal for 3.5-4 hrs until internal temp of 180F.
Crackle skin over charcoal by stopping rotisserie skin side down.
Rest for 30-45 mins.
Slice with a sharp knife.
Serve with buttery mashed potatoes and gravy.