Peppery Vegetable Curry (Gaeng Liang)

Ingredients

Equipment Needed

• •Heavy granite mortar and pestle (krok), at least 8 inches diameter
• •Medium stockpot

Instructions

1. 1

   Pound the kreung tam

   Start with the white peppercorns in a heavy granite mortar. Pound them until they're cracked and fragrant, a coarse powder with visible flecks, not dust. The pepper aroma should hit you immediately, sharp and floral and nothing like the stale pre-ground stuff in a jar. Add the shallots and pound them into the pepper until they break down into a rough mash. Now the dried shrimp. Pound them until they shred into the paste, releasing their briny, concentrated ocean smell. Finally the kapi (shrimp paste). Pound everything together until the paste is cohesive but still has texture. Not smooth. Rough. You should see fibers of shrimp and bits of shallot. That's the kreung tam. Four ingredients. Done.

   This is one of the simplest kreung tam in Thai cooking, but don't mistake simple for unimportant. The mortar matters here more than ever. A blender would pulverize the dried shrimp into powder and the shallots into liquid. The krok gives you a rough paste where every ingredient keeps some identity. That texture releases differently in the broth. Krok ก่อน.
2. 2

   Build the broth

   Bring the stock to a rolling boil in a medium pot. If you're using water, that works too, the kreung tam carries enough flavor on its own. Drop the pounded paste into the boiling liquid and stir to dissolve it. The broth will turn cloudy and start smelling intensely of pepper and shrimp. Let it simmer for 2 minutes to let the paste fully infuse. This isn't a coconut curry. There's no cream to crack. The paste goes straight into liquid. The broth IS the curry.

   Pork stock gives the best body for gaeng liang. If you have it, use it. If not, water is fine. The kreung tam is potent enough to carry a broth on its own. What you don't want is chicken stock, which competes with the shrimp paste. Keep the base neutral or pork-forward.
3. 3

   Add the hard vegetables

   Add the pumpkin cubes first. They need the most time. Simmer for about 5 minutes until they're tender but still holding their shape. You want them soft enough to eat but not falling apart into mush. The pumpkin provides the sweetness in this dish. No palm sugar needed. The natural sugar from fak thong does the work. That's a principle: when the ingredient provides the pillar, you don't add a substitute.

4. 4

   Add the softer vegetables

   Now add the luffa gourd, baby corn, and mushrooms. These need 3 to 4 minutes, no more. The luffa should be translucent and silky when it's done. If it's still white and firm, give it another minute. If it's gray and collapsed, you've gone too far. Baby corn should be tender-crisp. Mushrooms should be plump and have absorbed some broth.

5. 5

   Add shrimp and greens

   Add the fresh shrimp and the ivy gourd shoots (or spinach). The shrimp need 2 minutes, just until they curl and turn pink. Don't overcook. The greens need even less, 30 seconds to wilt. They go in last because they go from vibrant to sad in no time.

6. 6

   Season and finish

   Remove the pot from heat. Add the fish sauce. Taste. The broth should be peppery first, briny second, with a gentle sweetness from the pumpkin underneath. Adjust the fish sauce. You shouldn't need sugar if your pumpkin is ripe and sweet. Tear the lemon basil leaves (bai maenglak) off their stems and scatter them into the pot. Stir once. The basil wilts in the residual heat and releases a lemony, slightly minty fragrance that's completely different from horapha. Serve immediately in bowls over jasmine rice. This is a broth curry, ladle it generously. It should be soupy, not thick.

   Lemon basil (bai maenglak) is not the same as Thai sweet basil (horapha). Maenglak has smaller, lighter green leaves with a distinct citrusy, almost lemony scent. Horapha is anise-forward. Using the wrong basil makes this a different dish. If you can't find maenglak, a squeeze of lime juice with horapha gets you closer than horapha alone, but find the real thing if you can.

Chef Tips

• •White peppercorns (prik thai) are the soul of gaeng liang. Buy whole peppercorns and pound them fresh. Pre-ground white pepper from a jar is stale and bitter. Fresh-pounded prik thai has a floral, almost warm fragrance that's completely different. This is the oldest source of heat in Thai cooking, older than the chili. Treat it with respect.
• •The vegetable selection is flexible within reason. Pumpkin (fak thong) is non-negotiable, it provides the sweetness. Beyond that, use what's in season: luffa, zucchini, baby corn, angled gourd, straw mushrooms, oyster mushrooms, ivy gourd shoots (tamlueng). The principle is: a mix of textures and colors, all quick-cooking, all fresh. This is a vegetable curry. The vegetables are the point.
• •Gaeng liang is traditionally food for new mothers (อาหารแม่หลังคลอด). The white pepper helps circulation, the vegetables provide nutrients, the broth is easy to digest. Even if you're not postpartum, this is what you want when you're tired, run-down, or just need something nourishing that isn't heavy. Thai grandmothers prescribed this like medicine. They weren't wrong.
• •Don't add coconut milk. Don't add chili. Don't add palm sugar. Gaeng liang is defined by what it doesn't have. The restraint is the point. If you load it up with extras, you've made a different dish. Trust the kreung tam and the vegetables. They carry everything.

Advance Preparation

• •The kreung tam can be pounded up to a day ahead and refrigerated in an airtight container. The dried shrimp and kapi actually meld better overnight.
• •Vegetables can be cut and stored in water in the fridge for a few hours. Drain before adding to the broth.
• •The finished curry should be served immediately. The vegetables lose their texture and the lemon basil loses its fragrance as it sits. This is a cook-and-eat dish.

Frequently Asked Questions

Nutrition Information

1 serving (about 450g)