Slice meat into thin strips approximately into 1 inch wide and 4 to 6 inches long. Add salt, mustard oil and ginger paste.
Mix rest of the ingredients and marinate for 3-4 hours.
Skewer meat and barbeque on charcoal fire for best results, alternatively bake in a hot oven (400F-200C) over a drip tray till tender (20-25minutes).
Remove from oven. Brush oil over it and blacken and crispover a flame (If using a charcoal grill, cook over it till balckened and crisped).
To serve keep rotating the skewer until meat turns a bit crispy and blackened.
Serve with onion salad made with lemon, salt and diced green chillies.