Sai Oua (Northern Thai Sausage)

Ingredients

• For the aromatic paste
• 3 stalks Lemongrass, tender inner stalks only, sliced thin
• 30 g Galangal, peeled, roughly chopped
• 6 leaves Kaffir lime leaves, chiffonaded fine
• 20 g Fresh turmeric, peeled, roughly chopped
• 6 cloves Garlic, peeled
• 4 Shallots, peeled, roughly chopped
• 6 Dried red chillies, soaked in water until pliable, drained
• 1 tsp Shrimp paste
• 3 roots Coriander root, scraped clean, roughly chopped
• For the filling
• 600 g Pork shoulder, coarsely minced
• 150 g Pork fat, finely chopped
• 2 tbsp Fish sauce
• 1 tsp Palm sugar, shaved or grated
• 1 m Natural pork casings, rinsed thoroughly and soaked in cold water
• To serve
• 30 g Fresh ginger, peeled, sliced
• 3 Shallots, peeled, sliced thin
• 50 g Roasted peanuts
• 4 Dried chillies, whole

Method

1. 1
   Combine lemongrass, galangal, kaffir lime leaf, fresh turmeric, garlic, shallots, dried chillies, shrimp paste, and coriander root in a heavy mortar, beginning with the fibrous aromatics and adding the softer ingredients progressively, so the tough fibres break down first and do not leave stringy threads through the finished paste. Pound until the paste is smooth and cohesive with no visible fibrous strands. It is ready when it holds together and the smell is vivid and unified: lemongrass and galangal dominant, shrimp paste underneath.
2. 2
   Place coarsely minced pork shoulder and finely chopped pork fat in a large bowl, add the aromatic paste, fish sauce, and palm sugar, then mix vigorously by hand so the fat distributes evenly and carries the paste into every part of the filling — no pale, paste-free pockets should remain. Small flecks of lemongrass, galangal, and kaffir lime leaf should be visible throughout the mixture at a glance; a filling that looks predominantly pale is under-pasted. This is where the dish lives or dies: the paste must be generous and fully incorporated before the filling goes anywhere near a casing.
3. 3
   Take a small pinch of the raw filling and assess it on the nose, because the heat of cooking will mellow the aromatics and what smells forceful now will be balanced on the finished sausage. The smell should be overwhelming — vivid lemongrass and galangal with the deep, savoury backing of shrimp paste and dried chilli. If the smell is primarily of raw pork, work more paste through the filling before proceeding.
4. 4
   Thread the soaked natural casings onto the sausage stuffer and fill at moderate pressure, leaving sufficient room in each link so the filling can expand during cooking without splitting the casing — it should feel taut but not rigid when pressed lightly. Twist or tie off at intervals of approximately 12 cm. Do not overfill: a casing under excess pressure will burst on the grill before the filling has time to set.
5. 5
   Prepare a charcoal fire and allow it to reach an even, glowing heat with no raw flame, so the sausages colour gradually and the fat has time to render and carry the aromatic compounds outward through the casing rather than scorching on the outside while the centre remains raw. Turn the sausages regularly, letting the casing caramelise to a deep, even brown. The sausage is ready when it feels firm but with a slight give when pressed and the smell is identifiably intense with lemongrass, galangal, and charcoal smoke.
6. 6
   Remove from the heat and rest briefly so the juices settle back into the filling before cutting. Slice diagonally to expose the cross-section — the edge of the pork should carry a slight char, the interior coarsely textured with visible aromatic pieces throughout. Serve with fresh ginger, sliced shallots, roasted peanuts, and dried chilli.