1. Cook pasta according to package directions, omitting salt and fat; drain and keep pasta warm.
2. While water for pasta comes to a boil, combine 2 tablespoons pecorino Romano, panko, and next 4 ingredients (through garlic) in a medium bowl. Shape mixture into 16 (1-inch) meatballs. Heat a large skillet over medium-high heat. Coat pan with cooking spray. Add meatballs to pan; cook 6 minutes, turning to brown on all sides. Add marinara; bring to a boil. Cover, reduce heat to medium, and cook 5 minutes or until meatballs are done. Remove pan from heat; remove meatballs from pan with a slotted spoon. Add pasta to pan; toss to coat. Top with meatballs and remaining 2 tablespoons pecorino Romano. Garnish with basil, if desired.