For preparing special egg & potato sandwich, finely chop boiled eggs, onion, green chilly, potato and coriander leaves separately.
Now mix all the ingredients in a bowl except bread and butter: eggs, onion, green chilly, potato, cheese, mayonnaise, coriander leaves, pepper and required salt. Combine well.
Next, butter 2 slices of bread and spread the egg mixture on both slices evenly. Put 2 slices finely sliced tomato on top of it.
Place the bread slices one above the other. Repeat same with remaining bread slices.
Special egg & potato sandwich, a natural and highly nutritious snack, is ready.