Rinse and trim the mushrooms, and cut or slice.
Heat up a hearty dollp of butter in a frying pan where you can fit both halloumi cheese and mushrooms.
Fry the mushrooms on medium heat for 3-5 minutes until they are golden brown Season with salt and pepper.
If necessary, add more butter and fry the halloumi for a couple of minutes on each side Stir the mushrooms every now and then Lower the heat towards the end Serve with olives.