Firstly, heat a skillet and apply some butter.
Thereafter, warm the pita bread on the skillet till it puffs up.
In a mixing bowl, take grated cheese.
To this add chopped onion, chilies, chopped coriander, sliced olives and chopped bell pepper.
Finally, add black pepper powder, salt and oregano.
Now mix nicely.
To make the sandwich, open up each pita bread with a knife.
Apply mayonnaise on the one side of pita bread.
Fill the cheese mixture stuffing and tomato into each pita bread.
Bring forth the upper flap of pita and cover the cheese mixture.
Spray a grill pan with some cooking spray and heat it.
Now place the cheese pita sandwich onto the grill pan and grill it well. The cheese mixture should soften and grill marks appear.
Flip and grill on the other side as well.
Repeat for the remaining pita bread sandwich.
Cut into two and serve hot.