cakewalk; sleepwalk(разг.); be a easy as pie(Маме готовить ужин для шести – плёвое дело. – Making dinner for six was easy as pie for my mother –– MBerdy.2016); as easy as pie(Маме готовить ужин для шести – плёвое дело. – Making dinner for six was easy as pie for my mother –– MBerdy.2016); smooth sailing