The poppy-seed bagel scare is one of those urban legends that is apparently spot-on. Seinfeld episodes notwithstanding, it seems like everyone knows someone who knows someone who has tested positive for opiates that after eating a poppy-seed bagel or muffin, or it pops up in the news every once in a while. Like this…

Rivalries run deep on the East Coast, and one rift that’s less visible—but every bit as heated—is the bagel feud between New York City and Montreal. As someone who grew up between the two cities in Connecticut, I’ve felt my allegiances tugged from both directions. My mother, being that she is from Montreal, tipped the…