I will ask her, but I doubt that she will write it down for me. Her livelihood depends on it.
The other problem is, she uses Thai roots and spices that I do not really recognize. I think one of them is ginger, but I do not really know. She definitely uses these killer little peppers. There are always a few of them, cut up, floating around in the broth. God help you if you fuck up and eat one. I do not even like to swallow them whole. They will burn your gut, literally. I know.
Like I said, I think that her secret ingredient is lime juice. She squeezes fresh limes into the broth while she cooks it up in her wok.
The other secret ingredients are those mysterious roots and shoots and miscellaneous "greenery" that she throws in there. The broth is dark....really rich...lipsmacking tasty. I usually eat it with chopsticks, believe it or not, picking out the shrimp, mushrooms, onion, tomato, and baby corn, leaving just the inedible (included just for flavor) roots and greens. I then pick up the whole damned bowl and drink it down. My mouth burns JUST RIGHT.
I have to make a visa run to Cambodia tomorrow, but will ask her tomorrow night, after I get back.
Unless I decided to stay late in Bangkok, and go get a bath at the Bangkok Cosy. Then it will have to wait until the next day.