8 ounces straw mushrooms (canned) – drained and halved
3 tbsp fish sauce
2 tbsp Thai roasted chili paste (nam prik pao)
1 tsp palm sugar
0.25 cup lime juice – freshly squeezed
0.25 cup cilantro – coarsely chopped
lime wedges – for serving
Instructions
Rinse the shrimp. Peel and devein, reserving the shells (and heads if attached); keep the shrimp chilled.
Combine the water, reserved shrimp shells (and heads), lemongrass, galangal, makrut lime leaves, Thai bird’s eye chiles, and shallots in a medium pot. Bring to a boil over high heat, then reduce to a gentle simmer and cook 10–15 minutes until very fragrant.
Use a slotted spoon to remove and discard the shrimp shells (and heads), leaving the aromatics in the pot. Return the broth to a simmer.
Add the straw mushrooms and simmer 3–4 minutes until just tender.
Stir in the fish sauce, Thai roasted chili paste (nam prik pao), and palm sugar. Simmer 1 minute to dissolve and marry flavors.
Add the shrimp and simmer gently 1–2 minutes until just opaque and pink, with tails curled; avoid boiling to prevent toughness. Turn off the heat.
Stir in the lime juice and cilantro. Taste and adjust with more fish sauce or lime juice for a balanced hot-sour-salty profile.
Ladle into bowls and serve immediately with lime wedges for serving.