Cut the pork shoulder and pork belly into roughly 2 cm pieces.
Mix the meat pieces with the sea salt, paprika powders, chilli flakes, black pepper, allspice, coriander seeds, onion, garlic, oregano, basil, rosemary, and dextrose.
Grind the spiced meat through a 4.5 mm disc on a meat grinder.
Mix the ground meat for 5 minutes until it becomes sticky and holds together well.
Fill the pig intestines (size 30) using a sausage filler, then tie or twist at your desired length.
Refrigerate the filled sausages for at least 2 hours.
Cook the sausages on a grill or in a pan over medium-high heat for about 10 minutes, until the internal temperature reaches 63 °C (145 °F).
Freeze any sausages not consumed immediately in a vacuum-sealed bag.