Remove the bottom 1- 2 inches of the asparagus spears and discard. Brush tops with olive oil and grill till just tender.  A very slight char is preferable, and brings out extra flavor.  Allow to cool.

Slice Prosciutto lengthwise into 2-inch wide strips, and cut the scallion strips into 3-inch lengths.

Place a few scallion strips next to the asparagus spear and wrap tightly with the Prosciutto allowing the top of the spear to show. Place on a serving dish, drizzle with the Balsamic Vinegar, and top with Asiago cheese, sea salt and pepper.