Separate your asparagus into bunches of 3-4 if they are small or 1-2 if they are large.
Cut the prosciutto in half lengthwise and wrap the strips around the asparagus bundles.
Roll out the puff pastry into a rectangle slightly larger than the one you started with (about 1 inch in each direction). Slice into ¾ inch strips and wrap around the asparagus.
Optional: Brush the tops with an egg wash (1 egg and a splash of water whisked together)