1/4 cup Chopped fresh flat-leaf parsley (optional)
1 cup Freshly grated Parmesan
1 1/2 cups Heavy (whipping) cream or half-and-half, warmed
1 package Penne rigate or ziti
4 cups Chicken broth, preferably low-sodium
1 clove Minced garlic
2 tablespoons Unsalted butter
Freshly ground black pepper
Kosher or coarse salt
1 1/2 pounds Skinless, boneless chicken breasts