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1
Pound garlic and salt (pinch) in a mortar and pestle to form a paste.
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2
Add chillies; bruise lightly to release oils and seeds.
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3
Combine fish sauce, water, and palm sugar in a bowl; stir until sugar dissolves.
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4
Transfer garlic-chilli paste to sauce; add lime juice and cilantro; stir thoroughly.
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5
Taste and adjust sweetness/heat/acidity. Use immediately or refrigerate for up to 1 week.