Crispy Pork Belly Som Tam (Tam Moo Krob)

Ingredients

Equipment Needed

• •Large clay mortar with wooden pestle (krok din), at least 8 inches diameter
• •Long spoon for tossing in the mortar
• •Wok or deep heavy-bottomed pot for deep-frying
• •Wire cooling rack
• •Splatter guard (optional but your forearms will thank you)

Instructions

1. 1

   Prep the pork belly

   Bring a pot of water to a boil. Blanch the whole pork belly piece for 10 minutes. This renders some of the excess fat and tightens the skin so it fries evenly later. Pull it out, pat the skin completely dry with paper towels. Score the skin in a crosshatch pattern with a sharp knife, cutting through the skin but not into the fat. Rub the skin side with white vinegar and salt. The vinegar dehydrates the skin. Dry skin blisters. Wet skin cheats you of crunch. Set the pork belly on a rack, skin side up, and refrigerate uncovered for at least 20 minutes. An hour is better if you have it. The fridge pulls even more moisture out of the skin.

   The scoring matters. Shallow crosshatch cuts give the hot oil paths into the skin, creating more surface area for blistering. If you skip this step, you'll get uneven crunch: some parts shattered, some parts leathery.
2. 2

   Deep-fry the pork belly

   Heat enough vegetable oil in a wok or deep pot to submerge the pork belly. You need about 170°C (340°F). Lower the pork belly in carefully, skin side down. The oil will erupt. Stand back. Use a splatter guard if you have one. Fry for 15-20 minutes, flipping halfway, until the skin is deeply golden and blistered all over. The sound changes: it starts violent and angry, then settles to a steady crackle. When the crackling sound gets quieter and the skin looks like it could shatter from a hard look, it's done. Pull it out and rest on a wire rack for 5 minutes. Do not rest it on paper towels. The trapped moisture underneath will soften the skin you just spent all that time getting crispy.

   If the skin isn't blistering evenly, your oil temperature dropped. Fry in stages: bring the oil back up to temperature between pieces if you're doing multiple batches. Temperature control is everything with moo krob.
3. 3

   Shatter the pork

   Once the pork belly has rested, slice it crosswise into pieces about 1 centimeter thick. You should hear the skin crack as the knife goes through. If it doesn't crack, it's not crispy enough. Each piece should have three distinct layers: shattered golden skin, a thin strip of rendered fat, and tender pink meat. Set aside. These go on top of the som tam at the very end. Not in the mortar. On top.

4. 4

   Pound the aromatics

   In a large krok din (clay mortar) with the wooden pestle, pound the garlic and bird's eye chilies to a rough paste. Not smooth. You want visible chunks of garlic and split chili seeds. The heat hits your nose before it hits your mouth. That's how you know you're there. Add the long beans and give them four or five firm strikes. You're bruising, not destroying. The beans should crack and bend, still holding their shape.

   Clay mortar, wooden pestle. Always for som tam. The granite krok hin is for curry pastes where you need to break down fibrous roots and hard spices. The clay mortar's rough interior grips ingredients while the wooden pestle bruises gently. Every som tam vendor in Thailand uses krok din. Follow them.
5. 5

   Add shrimp and peanuts

   Drop the dried shrimp and peanuts into the mortar. Three or four light strikes to crack them open. The peanuts should split, not crumble. The dried shrimp should fray slightly, releasing their briny funk into the mortar. Don't overwork this. A few hits. Move on.

6. 6

   Build the dressing

   Add the fish sauce, palm sugar, and lime juice to the mortar. Use the pestle to stir and dissolve the palm sugar into the liquid. Taste the dressing off the pestle. This version leans Isan: less sweet than som tam Thai. The lime should lead. The fish sauce sits right behind it. The sugar rounds the edges but doesn't dominate. If it tastes sweet first, you've got too much sugar. Pull it back with more lime. Ajarn always said: add sour last, add sour slowly. Here, you're building the dressing in the mortar, so taste as you go.

7. 7

   Pound the papaya

   Add the shredded green papaya and halved cherry tomatoes to the mortar. Now the rhythm: strike down with the pestle, then use a long spoon in your other hand to toss and fold from the bottom. Strike, toss, strike, toss. Ten to fifteen rounds. You're bruising the papaya so each strand absorbs the dressing while keeping its crunch. The tomatoes should burst slightly, their juice mixing into the dressing. The papaya should look glossy and slightly wilted but still snap when you bite it. Not soft. Not limp. Dressed and alive. Taste a strand. If it's crunchy, sour, salty, with heat building at the back, you're done.

8. 8

   Plate and serve immediately

   Transfer the som tam from the mortar to a plate. Lay the sliced crispy pork belly across the top. Don't bury it in the salad. It sits on top so the skin stays shattered and dry until the moment you eat it. The first bite should give you that skin crunch, then the fat hits the sour dressing on your tongue, and everything changes. Serve with sticky rice (khao niew) and the raw vegetable plate: cabbage wedges, long beans, white turmeric. Eat immediately. Som tam does not hold. The lime is already working on the papaya. Five minutes from now, it's a different dish. A worse one.

Chef Tips

• •The pork belly and the som tam are two separate preparations that come together at the plate. Think of it as: the mortar does its job, the fryer does its job, they meet at the end. The moo krob never goes into the mortar. The moment you pound crispy pork into a wet dressing, the skin absorbs moisture and goes soft. Everything you did to get that crunch is wasted. On top. Always on top.
• •This version uses less palm sugar than a standard som tam Thai because the pork belly brings its own richness. Fat reads as sweetness on the palate. If you keep the sugar at the same level as a regular som tam Thai, the combination will be cloying. Dial the sugar back. Let the lime and fish sauce do the heavy lifting. The pork provides the luxury.
• •Buy your moo krob from a Chinese-Thai roast meat vendor (ร้านหมูกรอบ) if you want to skip the frying at home. Every Chinatown, every major market in Bangkok, has one. The pork belly comes already roasted with shattered skin. Chop it, lay it on the som tam. No shame in that. The mortar work is what matters. The pork is the variable; the technique is the principle.
• •Green papaya must be firm and white-fleshed. If it's turning yellow or orange, it's too ripe and will collapse under the pestle instead of absorbing the dressing. Use a Thai papaya shredder (that serrated claw tool) or a sharp knife to create long, irregular strands. Irregularity is correct. Factory-uniform shreds belong in a bag at a supermarket, not in your mortar.

Advance Preparation

• •The pork belly can be blanched, scored, seasoned, and dried in the fridge up to a day ahead. In fact, overnight drying produces even crispier skin. Keep it uncovered on a rack in the fridge, skin side up.
• •Green papaya can be shredded and stored submerged in cold water for up to 2 hours. Drain thoroughly and pat dry before it goes in the mortar. Water in the mortar dilutes the dressing.
• •The som tam itself cannot be made ahead. Pound it, plate it, eat it. The lime juice starts breaking down the papaya within minutes. Five minutes after pounding, the texture changes. Ten minutes, it's gone.

Frequently Asked Questions

Nutrition Information

1 serving (about 475g)