Ingredients

4 slices of bread
1/4 cup of crumbled or grated cheese (cheddar or feta or amul cheese)
1/2 of a small onion (chopped finely)
2 small green chillies(chopped)
1 tbsp of coriander leaves(chopped)
1 tbsp of butter
salt
1/4tsp pepper.

Method:

Apply Butter on all the slices.
Mix all the other ingredients in a bowl.
Now put this mixture on 2 slices. And cover them with the other 2 slices.
Heat oil or butter in a pan and toast these sandwiches on both the sides.

Note: They get toasted very fast so make sure u keep checking it.