I finally made a potato knish and it was a hit with everyone who tried it. Think savory mashed potatoes and caramelized onions enclosed in a crispy puff pastry crust and you have a major comfort food.

Joy Jaffe shares her recipe for potato knishes. Pastry is rolled out and filled with a mixture of mashed potatoes and chopped onions. Roll up, cut into small pieces and bake until brown. This recipe ...