What was the first opera written by the composer of "La Colombe"?  
La colombe: La Colombe ("The Dove") is an "opéra comique" in two acts by Charles Gounod with a libretto by Jules Barbier and Michel Carré based on the poem "Le Faucon" by Jean de la Fontaine. Charles Gounod:  from his first opera "Livre de recettes d'un enfant" (Op. 24) is still performed in concert as an encore, similarly to his "Jewel Song" from Faust.
Livre de recettes d'un enfant