"Store-bought puff pastry is the true workhorse in this elegant recipe, which involves three basic components: puff pastry, cheese and potatoes When cooking with limited ingredients, quality is key, so use puff pastry made with real butter if you can get it — the flavor is better and the puff is, simply put, puffier The dough is formed by a process called “lamination” in which alternating layers of butter and dough are folded together..."