“How could a kosher restaurant have opened in Park Slope without my knowing about it?” I unceremoniously asked of the first person to greet me as I walked into Chagall Bistro, who happened to be Dan Gicquel, the restaurant’s owner. Ten minutes before, I was settling in for a Sunday night dinner of hard-boiled eggs when a scan of my Facebook newsfeed turned up a friend’s posting: “New kosher restaurant on 5th Avenue and 5th Street!” I shared the news with my husband, who joined in my incredulity that this critical information had slipped past the vigilant watch we keep over all of brownstone Brooklyn’s Jewish news. A moment later, our phone rang. It was a foodie friend of ours who happened to be driving through the neighborhood. We shared the news, called the Facebook friend who had started it all, and a few minutes later, the four of us were scrutinizing the meat menu posted outside of the restaurant’s doors, its kosher certification prominently displayed, and I was demanding answers.