Peel and slice the mushrooms.
Cut the halloumi into thick slices.
Heat a small knob of butter and 1 tbsp olive oil in one frying pan and 1 tbsp olive oil in a second frying pan. (If you only have one frying pan cook the mushrooms first and keep them warm.)
Once they are hot, add the mushrooms to the pan with the butter and oil and the halloumi to the other pan.
Fry the mushrooms until they are cooked and the hallomi until it is lightly browned on both sides.
In the meantime heat the pitta bread in a toaster or under the grill.
I serve everything on the table so we can put our own pockets together: Cut the pitta bread in half to make a pocket and stuff it with houmous, fried mushrooms and halloumi. Messy but good!