Welcome to Grub Street’s rundown of restaurant recommendations that aims to answer the endlessly recurring question: Where should we go? These are the spots that our food team thinks everyone should visit, for any reason (a new chef, the arrival of an exciting dish, or maybe there’s an opening that’s flown too far under the radar). This month: an actually good restaurant near Penn Station, fresh pitas in Park Slope, and a Greek spot in Tribeca that elevates lunch.