In a steel pressure cooker, boil the potatoes and beetroots on a low flame for 2 whistles.
Once the cooker cools down, remove the vegetables and let them cool down.
Peel the vegetables. Mash the potatoes and grate the beetroot.
Mix in the salt, cumin, chat masala, coriander leaves and lemon juice.
Pinch out a little of the mixture and shape into a medium sized cutlet. If the mixture is too sticky, add some bread crumbs to firm it up! Use up all the mixture.
Roll each patty lightly in suji to coat both sides. Shallow fry till crispy.
To assemble, slice each bun horizontally in the middle.
Apply butter on all sides and toast lightly on tawa.
Apply mayonnaise, sauce, chutney on one side of the bun.
Place the beetroot cutlet on it. Top with tomato, onion, and lettuce – if using.
Cover with the other bun and serve warm.