Take a bowl.

Mash the potatoes.

Then add onion, green chilies, a little red chili powder and salt as per taste and mix it.

Mixture is ready.

Take two breads and apply some mixture on it.

Turn on the gas and put a pan on it, when the pan gets hot

Put some butter in the pan and cook the bread till it turns golden brown.

When the bread is cooked well. So cut the bread in the shape of a sandwich and then enjoy it with tomato ketchup.