How to Make It
Cook the pasta according to the package directions; drain, return to the pot, and let cool.
Heat oven to 400° F. Rub the chicken with the oil and season with ½ teaspoon salt and ¼ teaspoon pepper. Place on a rimmed baking sheet and roast until cooked through, 20 to 25 minutes; shred.
Toss the pasta, shredded chicken, olives, and bocconcini with the pesto and ¼ teaspoon each salt and pepper.