1. Chop onions, mushroom. Boil green peas.
2. Add oil in a kadai and add the onions and saute for a minute.
3. Then add mushrooms, green peas and allow cooking for sometime.
4. Now add salt, garam masala, chilli powder and stir for somemore time till cooked. Keep aside.
5. Toast the bread slices. Now stuff the filling on the bread slices.
6. Keep in a sandwich maker and now your sandwich is ready.

Image: Flickr/creativecommons pointnshoot