In a bowl. mix together all the ingredients, except butter and tomato sauce. keep aside.
On one side of a bread apply some butter and on the other side some sauce. Place little of the mix on the side with sauce. Place another slice over it and fry on a grilled pan on both sides for 2-3 minutes.
Transfer to a serving plate. Make similar sandwiches with the remaining bread slices and paneer mix.
Serve along with tomato sauce / green chutney for breakfast.