How to Make It
Cook the pasta according to the package directions; drain and return it to the pot.
In a large skillet, cover the chicken and 1/4 sliced lemon with salted water. Bring to a simmer and cook until cooked through, 4 to 5 minutes. Remove the chicken and shred, using 2 forks. Discard the lemon.
Add the chicken, parsley, pecorino, olives, oil, garlic, lemon zest, lemon juice, and ¾ teaspoon salt and ½ teaspoon pepper to the pasta and toss to combine.