Start by hollowing out 4 apples. Use a paring knife to cut a circle around the top of the apple. Remove what you can with the knife, before switching to a melon baller. Set these apples on a parchment lined baking sheet.

In a mixing bowl, use a fork to combine the brown sugar, vanilla, lemon juice, flour, salt, room temperature butter, and cinnamon.

Next, peel, core, and dice the remaining three apples. Pour the diced apple into the mixing bowl and toss them in the butter, flour, sugar mixture.

Spoon the diced apples into the hollowed out apples.

Cut four squares, about 4 inches big, out of the puff pastry. Then cut a few slits in the center. Drape the puff pastry over the apples. Brush with the melted butter and sprinkle with raw sugar.

Bake at 400 degrees for 30 minutes.