Here's a juicy prize: two (2) $15 gift certificates to Zen Thai & Japanese Cuisine (9250 Watson Road, Crestwood; 314-842-0307). All you have to do is tell me where I ate this soup.
Rules: To be eligible, you must leave a valid e-mail address (or Twitter handle or Facebook profile URL) in the comment-entry field. One guess per e-mail address. Employees of the restaurant in question and Riverfront Times are not eligible.
Hint #1: Not pictured are the three (3) flour tortillas served on the side.
Hint #2: I'm west of I-270 and north of Manchester Road.
Hint #3: This restaurant has only one location, though its name might lead you to think otherwise.