Working in downtown Boston can be tough. The commute sucks, it’s tough to find a bar without shamrocks on the wall, and a guy pretending to be John Hancock will threaten to tar and feather you when you go for your afternoon cortado. At least you can get some great ramen for lunch, though. Oisa Ramen is a counter-service spot on Broad Street that also serves poke and donburi bowls. It’s all good, but stick with the noodles and get the one with the truffles.