i've picked out this granny smith apple here, but you can use red or delicious, ginger gold, whichever is your favorite. granny smiths that i use in this puff pastry tart are nice and tart and gives it kind of an acidic crunch. ♪ takes a little practice. gonna cut the apple directly in half, just on the side of the stem. you'll see how close i got to the seeds. seeds here, no seeds here. the way we want to cut this apple is to cut in very thin slices. of course, with the help of your parents, you, too, can do this. make slices about a quarter an inch thick. a little bruising is fine on your apple. it just means it's a little sweeter. you want to put all of your apple slices into a bowl with water and lemon juice. this will keep them from turning brown. once your apples are cut, you can start with the puff pastry dough. you can find this at your local grocery store, supermarket, wherever you go to find puff pastry dough. they come in big long rolls just like this one, but we're only gonna use about half. can use the other half for later. you want to cut the puff-pastry dough into rectan