From our friend Megan at http://www.megankastning.com/!!!
Wrap thawed shrimp with 1/2 basil leaf then 1/4 slice of prosciutto. Secure with a toothpick (make sure to soak toothpicks in water so not to burn and place them in sideways). Spray shrimp with olive oil cooking spray and grill on gas grill until shrimp is pink and cooked through.