While scribbling orders at his family’s restaurant, Kabab & Curry, in the Buffalo, N.Y. suburb of Williamsville, Ansar Khan and his friend and fellow waiter James O’Leary started fantasizing ...

Add the garlic ginger mince and capsicum and cook until soft. Add the curry powder, beef seasoning, beef cubes and tomato pure. Mix well. Add the tomato paste, mix and cook until the oil bubbles up.