You'll find this recipe in Dorie Greenspan's 'Baking - From my home to yours' and it's deifnitely one of the simplest dessert recipes out there. Just four ingredients, an oven and a mere 20 minutes plus maybe another 5 minutes prep time and you'll have your own home-made dessert. Let me show you how!
Start by taking 1 piece of puff pastry out of the freezer and let to defrost. Our apartment is quite warm and find that 15 minutes does the trick. Peel and core 2 green apples; slice in half and then divide again so you have 4 pieces per half a apple. Using a large round cutter, cut out 4 circles out of the defrosted puff pastry. Assemble half an apple on each round of pastry. Top with 5g diced unsalted butter on each round and a sprinkling of demara sugar.
Bake at 190 degrees for 20 minutes. Apple tarts are ready when the puff pastry has turned a golden brown. Serve with a scoop of vanilla icecream.
On days when I'm a bit too lazy to cut up the rounds, what I do is make one giant apple tart with one slice of puff pastry and apple slices piled in the middle and then all the sides rolled in. Find it actually tastes better as you get a better apple to pastry ratio...yes that does exist! (plus you don't end up wasting the bits of pastry which you end up cutting out) Be fore-warned though that this apple tart does taste better with that dollop of vanilla ice cream; so make sure that's in the freezer before you get started!