BISTAKE * 450 gm Beef, Rump Steak * 2 Onion * 75 ml vinegar * 1 tsp salt * 1 tsp pepper, Black, coarse grind * 100 ml oil * 1 curry leaf sprigs * 2 cg cinnamon stick * 1 tsp mustard seed, ground * 100 ml Stock * 1 tsp Sugar * 1/2 tsp chile powder