"Warm it in the oven, this" the counterwoman said. The classic potato knick ($3.99) is similar to a kugel, but much more like a yeast bread than a baked pudding. Onion and black pepper (this one needed more) are other principal ingredients; butter and slices of apple are felicitous accompaniments.
Potato knick — or, as pronounced and more often spelled, potato nik or potatonik — is also known in a version that resembles a large latke meant to be cut into wedges. I haven't found citations of this style that long predate Mark Bittman's recipe, which seems to have been first published in 2006.
Queens Pita Bakery
68-34 Main St. (Melbourne-68th Aves.), Kew Gardens Hills, Queens
718-263-8000