Cut the pav buns horizontally into halves.

Take a nonstick tawa heat butter.place pav buns over it. Shallow fry both sides until pav becomes light brown.

In same tawa put butter heat it,add onions,coriander leaves,salt, pav bhaji masala red chilli powder and chaat masala mix it and soute for 2-3 minutes at low medium flame.

Now put pav buns over the onion masala and press.