One of my favourite old working lunch haunts from years ago was the couple of coffee shops at Blk 22 Sin Ming Road. There were many interesting food stalls here, so there's something for everyone. In particular, there were three soup stalls - a bak kut teh stall, a braised duck stall with duck soup, and a "earth jar" soup stall. I've had them all, many times. Of the three, till today I still have a craving for the humble, comforting duck soup or kiam chay ark 咸菜鸭 from Hup Seng Duck Rice stall.
Stall name: Hup Seng Duck Rice
Address: 22 Sin Ming Road, Singapore 570022 (stall inside 22 Bgain Eating House coffee shop)
Nearest MRT: 15 minutes walk from Upper Thomson station
Tel: 6454 3810
Hours: 9:00am - 1:00pm (Thurs off)