Thaw the puff pastry in the refrigerator overnight. The next day, roll it out slightly to make it more flat, even and square. Using a 10-inch pan lid as your guide, cut out the largest disk possible with a pizza wheel and place it on a parchment-lined sheet pan. Chill it while you make the filling.
Place the applesauce in a saucepan with the lemon juice, cinnamon, brandy, and lemon rind. Stir and bring to a simmer, then cook down to 3/4 cup. Spread it on a sheet pan to cool it to room temperature.
Preheat oven to 375 degrees F.
Take out the puff pastry and spread the reduced applesauce on it to cover the surface of the pastry, leaving a 1/2-inch edge. Fan the apple slices in concentric circles over the applesauce decoratively. Sprinkle all over evenly and lightly with sugar then dot it with butter. Bake for 25 to 35 minutes until the apples are tender and the edges are golden brown.