The well-known "Ah Hui Big Prawn Noodle" from Longhouse along Upper Thompson is now at Balestier Market (it's right next to Boon Tong Kee). I still love their unique garlic-loaded soup with a herbal touch. Their prawns never disappoint either - they're always large and very fresh. My go-to order is the $5 prawn and pork ribs combo because I can never say no to tender meat.