Do not crumble finely. Some small chunks of paneer is fine. You can even chop paneer in small cubes instead of crumbling.
Add the following spice powders: 1 pinch of turmeric powder, ¼ teaspoon cumin powder, ½ teaspoon kashmiri red chilli powder, ½ teaspoon coriander powder, ½ teaspoon garam masala powder, ½ teaspoon dry mango powder (amchur powder).
Add 2 tablespoon curd (yogurt or dahi).
Also season with salt.
Mix very well.
Making Paneer Sandwich
Spread sandwich chutney on the slices.
Now place some thin onion slices and sliced bell pepper.
Sprinkle some chaat masala on top. Place the paneer stuffing.
Cover with the remaining bread slices on which both butter and sandwich chutney has already been spread.
Place the paneer sandwiches in a preheated sandwich maker.
Grill until crisp and golden.
Remove and serve paneer sandwich hot or warm with any dip or sauce of your choice.