Khao Tom Pu — Crab Rice Porridge / ข้าวต้มปู

Ingredients

• 1 (about 800 g) Mud crab (Scylla serrata), live or very fresh, carcass cracked and reserved; claw and body meat extracted and refrigerated
• For the crab broth
• 1.5 litres Water
• 3 roots Coriander root, lightly bruised
• 1 tsp White pepper, whole or coarsely cracked
• 4 cloves Garlic, lightly bruised
• For the porridge
• 200 g Jasmine rice, rinsed
• 2 tbsp Fish sauce, plus more to adjust at service
• ½ tsp White pepper, ground
• For the garnish
• 3 tbsp Fried garlic, thinly sliced and fried until golden
• 30 g Fresh ginger, peeled and cut into fine julienne
• 3 stalks Green onion, finely sliced

Method

1. 1
   Crack the crab carcass — shells, legs, and all shell fragments — into manageable pieces, so that the broken surfaces release their flavour directly into the water rather than seeping slowly through intact shell. Extract all claw and body meat cleanly and refrigerate it. Place the cracked carcass in a pot with the water, coriander root, bruised garlic, and whole white pepper, bring to a simmer over medium heat, and simmer for exactly 30 minutes — no longer, because beyond that point the broth turns dull and faintly bitter where it should remain clean and sweet. The broth is ready when it runs a clear, pale amber and carries a clean, sweet marine scent.
2. 2
   Strain the broth through a fine sieve, discarding all solids, then return the strained broth to the pot and bring it back to a gentle simmer. Add the rinsed jasmine rice — rinsed so the excess surface starch does not make the porridge gluey and opaque — and cook, stirring occasionally, until the grains have fully softened and the porridge has reached a thick, flowing consistency, approximately 25 to 30 minutes. The surface should move in slow, heavy rolls when stirred.
3. 3
   Season the porridge with fish sauce and ground white pepper, keeping in mind that the rice will have absorbed a considerable amount of salt during cooking, so begin with less than you think you need and build upward. This is where the dish lives or dies — taste critically and adjust with additional fish sauce until the broth tastes forward and savoury, with the crab's natural sweetness still distinct beneath, because an under-seasoned broth renders that delicate sweetness invisible while an over-salted one destroys it entirely.
4. 4
   In the final 3 minutes before service, fold the reserved fresh crab meat gently into the hot porridge — gently, so the pieces remain in recognisable, tender morsels rather than breaking down into the body of the rice. The meat is done when it has just turned opaque and yielding; remove from heat immediately, because even a minute more will cause it to tighten and lose the soft, sweet texture the dish depends on.
5. 5
   Ladle into warmed bowls and finish each portion with fried garlic, ginger julienne, and sliced green onion. Serve at once, as the crab meat continues to cook in the residual heat of the porridge.