Mix the fish tikka marinade in bowl and add the fish cubes.Coat evenly and let it sit in the fridge for 5 hrs or overnight.
Heat the grill and place the tikkas on a greased foil.Cook for about 8-10 minutes flipping them gently midway until you see slightly golden edges.
Once done sprinkle some lemon juice and chat masala.Keep aside.
Toast the pita and cut them in any desired shape.
Spread some green chutney.
Top with some fish tikka, onions and salad.