Split each roll into 2 layers. Spread half the pesto and half the mayonnaise on each bottom layer. Divide the turkey, tomato and arugula between the bottom layers. Top with the top layers.
Meanwhile, its sharp pine nut, garlic, and parmesan flavors bring the piquancy that turkey or chicken meatballs need. See for yourself if pesto might turn you into a lean protein meatball enthusiast.