Slice pears into thin slices and place in a bowl of lemon water. Let sit for a minute then remove and pat dry.
Slice the prosciutto pieces lengthwise and lay out on a cutting board. Slice the manchego into pieces that are not too thick but will not break in half.
Begin to assemble by laying down one piece of prosciutto, placing one pear slice at one end, a few pieces of arugula and one piece of cheese then rolling up. It should stay together but you can also use toothpicks to secure.
Lay out on your serving platter and drizzle with a little balsamic drizzle. Serve immediately. Do not plan to make these ahead bc they just don't last that long.