Plastering around window frame

[Tile rescue]

Hi guys just ripped out an old air condition unit and decided to put in glass bricks to lighten up the room. I now have to plaster around the frame and as I’m a DIY amateur am asking for suggestions on how to plaster around the frame. Thanks in advance

 

[JessThePlasterer]

Chip back that brick that’s a bit high, board and bead. Looks like you may need some kind of small trim round the frame as that just looks like mortar left?

 

[Cockney]

Cutting your opening level would be a good start