What does “som tam” mean?
In Thai, som points to sour or acidic, and tam means to pound (like in a mortar). That is a big part of the idea here: lightly pound and bruise the aromatics and vegetables so the salad tastes extra alive, not just “dressed.”
Can I make som tam without a mortar and pestle?
Yes. Use a mixing bowl and the back of a spoon to press and bruise the garlic, chiles, green beans, and tomatoes. You are not trying to puree anything, just rough it up so it releases flavor. (There is also a full bowl method in the instructions.)
Is dried shrimp necessary?
No, but it adds savory depth. If you skip it, add a touch more fish sauce and lean on other umami boosters you like. A tiny dab of anchovy paste can work in a pinch if you eat it. Or just go heavier on peanuts and call it a day.
What can I use instead of palm sugar?
Light brown sugar is the easiest swap. Granulated sugar works too. Start small, taste, and adjust.
What if I cannot find green papaya?
Use shredded carrot plus thinly sliced cucumber for the closest texture. You can also mix in shredded green mango if you find it, which leans extra tangy.
How spicy should it be?
Som tam is usually spicy, but you are the boss. Start with 1 Thai chile, taste, then add more. If you accidentally go too hot, add more shredded veg, a bit more sugar, and extra lime to rebalance.
Any allergy or diet swaps?
Peanuts: swap cashews or sunflower seeds. Fish sauce: use a vegan fish sauce, or try soy sauce plus a little extra lime (it will taste different, but still good). Dried shrimp: skip it.