In 12-inch skillet, heat oil over medium heat. Add garlic; cook about 30 seconds, stirring occasionally, until softened. Stir in marinara sauce and water. Cover; heat to boiling over medium heat.
Add pasta and return to boiling; cover and boil 8 minutes. Stir in chicken. Cook 3 to 4 minutes, stirring occasionally, until chicken is heated.
Remove from heat, sprinkle with cheese and serve.