Heat oil into pan. Add onion and saute for 1 minute. Add chicken,salt,turmeric,black pepper powder,red chilli powder, garam masala powder. Cook for 7 minutes in low flame. Pour the mixture into a bowl and add grated cheese and mix like dough. Toast breads. Cut each bread into two parts. In one part add tomato sauce and in another part add margarin. Fill with half of chicken stuffing and press.