"Mette lor Dum !" is an expression in Kréol Morisiyen to refer to a specific stage in the cooking of a Biriani (typically at a wedding feast - in the large 'Degs') in Mauritius. The Indian equivalent (specifically Hyderabadi) is to dum cooking.
See my earlier post for pictures of Degs and Biriyani at a Mauritian wedding.
Dampokhtak
Asaf-ud-Daula