"This is such a simple dish and with so few ingredients that comes out tasting like a million bucks. The chicken is soft, moist, and tender and there's ample sauce to coat everything and to add flavor. And anything covered in warm, gooey, melted cheese is automatic comfort food. Simply stuff manicotti shells with thin-sliced chicken breasts, smother with red pasta sauce, and bake. In the final ten minutes, add mozzarella cheese. Make sure the manicotti shells are resting on a thick bed of sauce and are then covered completely with sauce. For stuffing the shells I find using thin-sliced chicken breasts that I slice lengthwise in one-quarter inch strips works well...."