1Heat oven to 350°F. In medium bowl, mix pasta sauce and water. Spread about 1/3 of the pasta sauce mixture in ungreased 13x9-inch (3-quart) glass baking dish.
2Sprinkle garlic salt on chicken. Insert chicken into uncooked manicotti shells, stuffing from each end of shell to fill if necessary. Place shells on pasta sauce in baking dish. Pour remaining pasta sauce evenly over shells, covering completely. Cover with foil.
3Bake about 1 hour or until chicken is no longer pink in center and shells are tender. Sprinkle with cheese. Bake uncovered about 5 minutes or until cheese is melted. Sprinkle with basil.