Take a chopping board and dice (brunoise dice) onion and capsicum finely

Now add these vegetables in a bowl along with ketchup and grated cheese in apt amount and mix them in a bowl.

Add oregano to it and salt according to one's taste and mix them again.

When the stuffing is ready, take a bread slice apply some butter or whatever fats you eat on one side

On the other side, put a layer of stuffing in the middle of slice.

Place the cheese cube in the middle of the filling and cover the cube with another layer of filling giving a patty look with a cheese center

Now put the other slice on top and Tada ur sandwich is ready to be kept in a griller.

Grill the sandwich and enjoy with ketchup or whatever dip u prefer..