They have a long list of different versions of som tum (papaya salad). I went for the original Thai version (59B) which was delicious, pretty spicy (my guess is there were 2 or 3 chillis in it, so ask for less unless you love spice) and a decent size (although I'm not sure why the chunks of tomato were so big).
I also had the grilled chicken sticks (29B each) and sticky rice (15B). All three for 103B is a pretty good deal and it's a nice restaurant with plenty of outdoor tables and a nicely-cooled indoor area.