Skimming on edges of insulated plasterboard.

[mrgas]

Greetings to the Plastering and Rendering forum!

Im using some 27mm insulated plasterboard on a wall.
How do I cope with the window reveals re plastering onto exposed insulation. ( I reckon there will be about 10mm exposed beyond corner bead)
Do I plaster onto the insulation?
Cut back the insulation and put a thin strip of plasterboard in?
Or mitre the insulated board?

Thanks

 

[stevethespreader]

On one of the boards cut out the insulation the same thickness as the plasterboard creating a rebate the plasterboard on adjoining wall then slots into rebate