Equipment
* optional
Ingredients
Fresh Produce
- 3 limes, halved crosswise
- 4 bird's eye chiles, whole, stems removed
- 3 garlic, peeled, whole cloves
- 10 g thai basil, fresh leaves only
- 10 g cilantro, stems and roots only, roughly chopped
Pantry Staples
- 45 ml fish sauce, premium grade preferred
- 30 g palm sugar, finely chopped
Nutrition (per serving)
Method
Place a dry cast iron skillet over high heat and let it preheat until very hot, approximately 260C/500F.
Place the lime halves cut-side down, whole chiles, and garlic cloves directly onto the dry skillet. Cook until heavily charred and blistered. The limes will take the longest. Remove items as they finish.
Once cool enough to handle, squeeze the juice from the charred lime halves into a small measuring cup. You should yield about 60ml of smoky juice. Discard the spent lime rinds.
In a mortar and pestle, combine the charred chiles, charred garlic, chopped cilantro stems, Thai basil leaves, and palm sugar. Pound vigorously until a coarse, aromatic paste forms.
Add the fish sauce and the smoky lime juice to the mortar. Stir gently with a spoon to lift the paste from the bottom, ensuring the palm sugar is completely dissolved.
Transfer the sauce to a serving bowl and let it rest at room temperature for at least 30 minutes before serving. This allows the aggressive heat and sharp acidity to mellow and marry.
Chef's Notes
- Grilling the citrus fundamentally changes its profile, reducing its sharp raw acidity and introducing a complex, caramelized tartness that pairs beautifully with rich seafood.
- Using cilantro stems and roots instead of leaves provides a much punchier, earthy flavor that holds up to the aggressive heat of the chiles and the funk of the fish sauce.
- If you do not own a mortar and pestle, you can finely mince the aromatics by hand or pulse them in a small food processor, but pounding releases essential oils that chopping simply cannot replicate.
- For the most authentic smoke flavor, try grilling the aromatics over hardwood charcoal rather than a stovetop skillet.
Storage
Refrigerator: 1 week — Store in an airtight jar. The fresh herb notes will diminish slightly over time, but the smoky flavor deepens.
Freezer: 3 months — Freeze in ice cube trays, then transfer to a sealed bag.
