1. Braise onion with taj until golden.2. Add masala and spices, braise till fragrant.3. Add steak, mustard and vinegar and coat well.4. Cook till no water remains, then add tomatoes and sauce.5. Add more water if needed to cook till steak is tender.6. Cook until a thickened gravy has formed. Remove taj. Shred the steak.7. Slit the tops of rolls. Squirt in tomato sauce.8. Spoon in steak with gravy and then squirt over little more sauce.9. Sprinkle over cheese and herbs. (Freezer suitable).10. Bake in preheated oven till crispy on outside and cheese is melted or heat in microwave.