Thaw your pastry puff following the packaging instructions.
Cut into 6 rectangles and line on your baking sheet.
Make your egg wash by combining a splash of milk with an egg. Brush or spoon on the egg wash to the tops of 3 of the pastry puff rectangles.
Using a knife, cut slits into the pastry puff shell that has the egg wash on it. Using a fork, make little indentations for the 'stars'. You'll fill with sprinkles but this gives you an idea of where to place them. You don't have to do this part but I found it helpful.
Add jam to the bottom layer that does not have the egg wash on it.
Stack the top of your toaster strudel or poptart onto the bottom piece of pastry puff.
Next, using a fork, close the toaster strudel but gently pressing down. If its stick add a bit a flour to the fork.
Then, bake for 18-20 minutes at 375 degrees Fahrenheit.
Make your icing by combining water and powdered sugar and a bit of vanilla. Drizzle over the top of the toaster strudel along the lines of the flag. Add sprinkles as the stars.