In a big bowl mix cubes (medium size) of paneer, all capsicums and onion. Add 1 tea spoon oil, pepper powder and salt to it. Mix well and keep a side for minimum 5 minutes.
Heat remaining oil in a non-stick pan and cook marinated paneer and vegetables to it for just 2 minutes. Keep a side.
On a slice of bread spread grated cheese over it. Sprinkle some chilli flacks and oregano over it.
Place another bread over it and spread paneer mixture along with olive slices on it. Cover with third bread slice.
Now apply some butter over the top of the sandwich and place it up side down in griller, apply some butter on the top of the sandwich again.
Repeat the same for remaining.
Grill for 5 minutes in griller. When ready remove from griller and place another sandwiches.
Hot and delicious Pizza Sandwich is ready to serve. Cut them and serve hot with tomato ketch up.
In case griller is not available sandwiches can toasted on tava also. But in that case assemble sandwich between two layers of bread.