Put butter in a pan, when the butter gets melt adds cumin seed and sauté it.
Now add finely chopped onions, ginger garlic paste and sauté it for few seconds.
Now add all the veggies: finely chopped (carrot, cabbage) and mix it well.
Add finely chopped capsicum and mix it well again and sauté it for few seconds
Lastly add finely chopped tomatoes and to make the cooking fast add salt, mix it well and sauté it for few seconds.
Now cover the lid and cook it on medium flame for 4-5 minutes.
After 4-5 minutes uncover the lid and if the veggies become soft add all the spices: Kashmiri red chilly powder, pav bhaji masala, freshly chopped coriander leaves and mix all the spices very well with veggies.
Now add little water and mash all the veggies with the help of masher.
Lastly add lemon juice and mix it well.
Masala is ready now to make masala pav.
To make masala pav cut pav from the center into slices.
Take another nonstick pan and melt some butter on tawa.
Place the pav slices on the butter and toast it on medium flame.
Apply some butter on top of the pav, turn over and toast it from other side too.
Now place thick layer of masala on the pav evenly with the spoon, cover it with another slice and again spread some masala on top of the pav.
In the same way melt butter and toast rest of the pav slices and make masala pav.
Lastly garnish it with freshly chopped coriander leaves and grated paneer.