Geylang East Hawker Centre is an oasis of Wanton Mee stalls. There are some which are open in the morning, some are open in the afternoon and some in the evening. I went for breakfast one morning and decided on Guan Kee.
It’s quite old school, with nice QQ noodles, red char siew that is a little dry and decent wantons.
The taste is quite nice, there are better though, but this one is definitely one of the better ones I have eaten.