Tests of faith at Bronx soup kitchen propel Heidi Schreck’s story featuring Quincy Tyler Bernstine and Bobby Moreno

It’s clear why Mazzella’s Market, a produce grocer in Hell’s Kitchen, gets a special thank-you in the Playbill for Grand Concourse. This worthwhile, albeit not completely convincing, drama about the limits of faith, connections and compassion unfolds in a Bronx church soup kitchen. Over the show’s 100 minutes, carrots, potatoes and zucchinis are constantly chopped and tossed into simmering kettles to feed the hard-luck and hungry. The slicing and dicing is always realistic, but the script by author and actress Heidi Schreck doesn’t always land with the same sharped-edged authenticity. Sure, the four characters are colorful and quirky — and brought to life vividly in director Kip Fagan’s staging. Still, some of the actions, plot twists and dialogue stretch credulity.