The Wan Ton Mee hawker at Restaurant Sri Kota offers 叉燒 ChaSiew, 水饺Dumplings, 滑鸡 Chicken, and 冬菇鸡脚 Chicken Leg w/Mushroom Wan Ton Mee variants. All variants $6 for regular and $6.50 for large.
I would say to go with the yam rice which is a good combination.