Plutella xylostella

All stages of the lifecycle were found in a single cauliflower. One of the moths eclosed out of the pupa on the same say, hence dates of all observations stay the same.

Ref-
https://ftp.funet.fi/pub/sci/bio/life/insecta/lepidoptera/ditrysia/yponomeutoidea/plutellidae/plutellinae/plutella/#xylostella
https://www.cabi.org/isc/datasheet/42318
https://en.wikipedia.org/wiki/Diamondback_moth