Place pork skin-side down. Score the pork belly with diamond pattern.
Now place the pork skin-side up. I use a meat tenderizer to put holes in the skin. Season with salt and refrigerate uncover for overnight. This will reduce the moisture and result in a crispy skin.
If you see some moisture on the pork belly, use a paper towel to remove it.
Mix fennel seeds, mixed herbs, garlic, salt and pepper. Rub the mixture into the cracks in the meat. Season the skin with salt and pepper only.
Roll belly into tight log. Tie around the log with butcher’s string.
Preheat the oven at 300ºF, roast for about 2 hours. Check and it should have very little resistance when you poke it.
Increase oven temperature to 500ºF, continue roasting until completely crisp.