Combine the basil, pine nuts, lemon juice, garlic, salt and pepper in a food processor. Pulse until finely chopped. With the motor running, slowly drizzle in the oil until well combined; set aside.
Pat each scallop dry with paper towel. Cut each slice of prosciutto into 4 long strips. Wrap a strip of prosciutto around each scallop and secure with a toothpick.
Select the "Fish/Seafood" program and press "OK". Once the purple indicator light has stopped flashing, place the scallops on the grill and close the lid.
Cook until the indicator light has changed to the colour orange. Top each scallop with a dollop of pesto and a few additional pine nuts.
Tips: The scallops make an elegant starter. Or, for an entrée, toss some of the pesto with hot cooked pasta and top with cooked scallops. Extra pesto can be stored, tightly covered, in the refrigerator for up to 5 days. Use the pesto as a condiment for grilled chicken, sausages or as a sandwich spread.