Based on Ina Garten's recipe.
1 1/2 apples, diced into little chunks
2 tablespoons sugar, plus extra to sprinkle on top
1 tablespoon all-purpose flour
sprinkle in about teaspoon ground cinnamon
Pinch kosher salt
1 sheet of puff pastry, thawed (leave it out on your counter for a little bit before making the filling)
egg for brushing on top of the dough
Combine the apples, juice, zest, cinnamon, flour, salt and sugar into a bowl and let them sit for a bit. Slice the puff pastry into two triangles by cutting a diagonal line from one corner to the other. Fill each side with the apple mixture and fold the dough over to make a triangle. Use a fork to crimp all unsealed edges together. Do the same until you run out of apples. Brush the top of each with the water or egg and a little sugar if you want. Bake them on a cookie sheet for about 20 minutes at 400 degrees. You want them to be very golden brown all over. I like to serve them with a big scoop of vanilla ice cream.