In a small bowl whisk together all ingredients until emulsified. Set aside.
Grilled Prosciutto Wrapped Asparagus
Preheat grill to medium. Cut each prosciutto slice in half lengthwise, yielding 24 slices. Cut the woody bottom 1-2 inches off of each asparagus spear. Using a vegetable peeler shave off any remaining woody or thick bits from the bottom portion of the asparagus spear so the whole spear is uniform in thickness.
Wrap one piece of prosciutto around each asparagus spear, overlapping just slightly. The prosciutto will stick to itself as it's wrapped. Grill on preheated grill for approximately 8 minutes, turning once or twice to brown on all sides. The exact time will vary depending on the thickness of the asparagus. The asparagus should hold it's shape and still be slightly firm to the bite.
Arrange asparagus on platter. Re-whisk Lemon Pepper Vinaigrette if needed and drizzle over asparagus. Serve immediately with remaining vinaigrette on the side.