It’s easy enough to make a mediocre potato knish, but something else altogether to arrive at that perfect junction of mushy and firm, when it’s exactly ready for a dab in deli mustard before hitting your mouth and making your day. Leave it to a kitchen crew out of New York to make it happen. The Linq, 702-862-2695. Sun-Thu, noon-2 a.m.; Fri & Sat, noon-3 a.m.
