2 cans of crescent rolls
Preheat the oven to 400 degrees. Lay out crescent rolls (unrolled). Place 3 or 4 thin slices of apple in the middle of each of crescent roll. Sprinkle (or dump, as I chose to do) some brown sugar, cinnamon and nutmeg on each clump of apples, then add a little slice of butter on top, too. Fold up the crescent rolls around the apple cluster. This part gets a little messy, but by the last one I'm confident you will have created an ingenious method of your own (I believe in you!). Brush the top of the crescent rolls with egg wash, then sprinkle on some more sugar and spice. Bake for about 12 minutes, until puffed and brown. Serve warm.
NOTE: You can also add a slice of brie to each tart before cooking for something a little fancier.