1.Bring A Pot Of Lightly Salted Water To A Rolling Boil; Cook The Fettuccini At A Boil Until Cooked Through Yet Firm To The Bite, About 8 Minutes; Drain. Transfer The Fettuccini To A Bowl. 2.Melt The Butter In A Saucepan Over Medium Heat. Cook The Garlic And Pesto In The Melted Butter Until Warmed, 2 To 3 Minutes; Pour Over The Fettuccini And Toss To Coat.