Wash and chop onions and tomato. Take a pan and add butter into it

Add onion and cook for two minutes untill it becomes little brown then add tomato and add little water into it and cook it well and add all masalas into it

Mash one boiled potato into it and mix it well and now heat the tawa and apply butter over it and slit pav and cook both sides of pav

After cooking one side of pav stuff the masala and cover it and serve it