This Bombay style masala toast sandwich tastes amazingly delicious and similar to the roadside street vendors. Looks like there are many different elements, but actually, it is very easy to make.
Heat the oil in a pan on medium heat. Once hot add mustard seeds and let them splutter. Then add cumin seeds and let them sizzle a bit.
Now add ginger paste and chopped green chilies. Saute for 30-40 seconds or until the raw smell of ginger goes away.
Add chopped onions, sprinkle little salt and mix. Cook until onions are soft and translucent or light pink in color.
Then add turmeric powder, red chili powder and remaining salt. Mix well.
Immediately add potatoes and peas. Mix everything well, while mixing mash a few potatoes using the back of the spatula.
Now add freshly chopped cilantro.
Drizzle some lemon (lime) juice and mix well. Taste adjust the salt, lemon as needed. If masala becomes too tangy because of lemon juice then you can add a pinch of sugar to balance the flavor.
Making Masala Toast Sandwich:
Before you start assembling the sandwiches, keep all the elements ready on the counter.
Spread the butter on four bread slices. Then spread green chutney.
Now on two bread slices, spread 2-3 tablespoons of masala evenly.
Arrange the veggies (tomato, cucumber, onion). Sprinkle sandwich masala powder on top.
Close the sandwich with another bread slice. Apply butter on top and place butter-side down on the sandwich toaster. Then again spread butter on top of bread and close the toaster.
While these two are toasting, assemble another two sandwiches and keep them ready. Cook them until they are golden brown and crispy from both sides.
Remove it to a plate, cut into 4-pieces. Spread butter on top, followed by green chutney and ketchup. Then sprinkle nylon sev and little sandwich masala on top. Serve immediately before it gets soggy.
Notes
You can make green chutney a day before to save some time on the day of making sandwiches. And the same goes for sandwich masala powder.
Instead of making at home, you can use store-bought chutney and masala.