Are Jenůfa and The Knot Garden operas?
Jenůfa Jenůfa    (Její pastorkyňa, "Her Stepdaughter" in Czech) is an opera in three acts by Leoš Janáček to a Czech libretto by the composer, based on the play "Její pastorkyňa" by Gabriela Preissová. It was first performed at the Brno Theater, Brno, 21 January 1904. It was written between 1896 and 1902, and counts among the first operas written in prose.
The Jewel Box The Jewel Box is a pasticcio opera constructed by Paul Griffiths out of various pieces by Wolfgang Amadeus Mozart. Its mostly English libretto by Paul Griffiths includes new translations of most of the Italian-language texts of the musical numbers. It was premiered by Opera North at the Theatre Royal, Nottingham, on 19 February 1991. The conductor was Elgar Howarth, the director was Francisco Negrin and the designer was Anthony Baker.