Question: Clinton Marius, is a South African writer and performer, he made his first professional appearance singing the lead role in which opera in one act by Gian Carlo Menotti with an original English libretto by the composer?

Context paragraphs:
The Scarf (opera): The Scarf is a chamber opera in one act by composer Lee Hoiby.  The work uses an English libretto by Harry Duncan that is based on the short story "The Witch" by Anton Chekhov.  Composed in 1955, the opera premiered on June 20, 1958 at the very first Festival dei Due Mondi in Spoleto, Italy in a production by Gian Carlo Menotti and conducted by Reinhard Peters.  The cast included Patricia Neway as Miriam, John McCollum as Reuel, and Richard Cross as the Postman.  The work received its American premiere the following year at the New York City Opera.

A Hand of Bridge: A Hand of Bridge, opus 35, is an opera in one act composed by Samuel Barber with libretto by Gian Carlo Menotti, and is possibly the shortest opera that is regularly performed: it lasts about nine minutes.  It premiered as a part of Menotti’s Festival of Two Worlds in Spoleto on 17 June 1959 at the Teatro Caio Melisso.  The United States premiere occurred the next year.  The opera consists of two unhappily married couples playing a hand of bridge, during which each character has an arietta in which he or she professes his or her inner desires.

The Telephone: The Telephone, or L'Amour à trois is an English-language comic opera in one act by Gian Carlo Menotti, both words and music.  It was written for production by the Ballet Society and was first presented on a double bill with Menotti's "The Medium" at the Heckscher Theater, New York City, February 18–20, 1947.  The Broadway production took place on May 1, 1947, at the Ethel Barrymore Theatre.  The Metropolitan Opera presented it once, on July 31, 1965.

Help, Help, the Globolinks!: Help, Help, the Globolinks!  is an opera in four scenes by Gian Carlo Menotti with an original English libretto by the composer.  It was commissioned by the Hamburg State Opera and first performed as "Hilfe, Hilfe, die Globolinks!"  in a German translation by on December 21, 1968 in a double bill with Menotti's "Amahl and the Night Visitors".  The opera had its English language premiere on August 1, 1969 in the United States at the Santa Fe Opera in a double bill with Igor Stravinsky's "The Nightingale".  Both premiere productions were directed by the composer.  Many of the cast members from the Santa Fe production reprised their roles for the work's New York debut at the New York City Opera in December 1969.

Labyrinth (opera): Labyrinth is an opera in one act by composer Gian Carlo Menotti.  The work was commissioned for television by the NBC Opera Theatre and uses an English language libretto by the composer.  Unlike Menotti's previous television operas, such as "Amahl and the Night Visitors", this opera was written with no intention of being moved to live stage performance later.  Menotti intended for this work to utilize the special effects unique to television which could not be recreated in live theatre.  As a result, NBC's television production of the opera is the only performance the work has received.  At its premiere in March 1963 the opera was mainly criticized by the press for its trite use of allegory and music which rejected the avante garde in favour of romanticism.  Critic Harold C. Schonberg stated in his review in "The New York Times" that, "Menotti falls back on the procedures he has always used: the scraps of canonic imitation, the stretches of parlando, the Puccini like melodies, the banal waltz themes... [It] ended up an allegory that had all the dimension of a Mobius strip: an example of slick television and cinema of the 1960s wedded pretty much to music of the 1890s... On the whole "Labyrinth" is one of the thinnest musical concoctions Menotti has ever put together.

Martin's Lie: Martin's Lie is a chamber opera in one act with music and an English language libretto by Gian Carlo Menotti.  Commissioned by CBS, it was Menotti's third opera for television after "Amahl and the Night Visitors" and "Labyrinth".  Although not initially conceived as a work for the stage, the opera premiered in a live theatrical performance on 3 June 1964 at the Bristol Cathedral for the opening of the 17th annual Bath International Music Festival.  The opera was subsequently filmed with the same cast for television under the direction of Kirk Browning.  The production used sets and costumes by designer Anthony Powell, and was broadcast nationally by CBS for the opera's United States premiere on 30 May 1965.

The Saint of Bleecker Street: The Saint of Bleecker Street is an opera in three acts by Gian Carlo Menotti to an original English libretto by the composer.  It was first performed at the Broadway Theatre in New York City on December 27, 1954.  David Poleri and Davis Cunningham alternated in the role of Michele, and Thomas Schippers conducted.  It ran for 92 consecutive performances.

Amahl and the Night Visitors: Amahl and the Night Visitors is an opera in one act by Gian Carlo Menotti with an original English libretto by the composer.  It was commissioned by NBC and first performed by the NBC Opera Theatre on December 24, 1951, in New York City at NBC studio 8H in Rockefeller Center, where it was broadcast live on television from that venue as the debut production of the "Hallmark Hall of Fame".  It was the first opera specifically composed for television in America.

Clinton Marius: Clinton Marius (born 20 August 1966 in Pietermaritzburg) is a South African writer and performer.  He made his first professional appearance singing the lead role in Menotti's opera, "Amahl and the Night Visitors" at age twelve.  His poetry has been published internationally, while he is also known for penning several plays and collections of short stories, as well as the fictional biography of a guru, "Sunshine - The Booklet of the Biography".

The Old Maid and the Thief: The Old Maid and the Thief is a radio opera in one act by Italian-American composer Gian Carlo Menotti.  The work uses an English language libretto by the composer which tells a twisted tale of morals and evil womanly power.  Menotti writes in the libretto "The devil couldn't do what a woman can- Make a thief out of an honest man."

Supporting paragraphs: Clinton Marius Amahl and the Night Visitors
Answer: Amahl and the Night Visitors