The typical drill is to begin my Binondo Walk either in Sta. Cruz Church or Binondo Church. Ongpin Street connects the 2. And that's where all the "distractions" are. Not as simple as walking from A to B.
So if you're eager for an instant meal, get off just before Binondo Church where the Ongpin Statue is. Cross the street and walk towards HSBC. There is an alley beside HSBC leading to Po Heng Lumpia House.
After all, how can you go wrong with P50 Lumpia? Oh, there's Maki too. Chicken Maki, Pork Maki, Fish Maki. Each bowl costing P50 only. Mura!