Luke Nguyen: Fish sauce is rated the number one cooking ingredient in Vietnamese cooking. When I was growing up, and I was sent to the markets by my elders to buy fish sauce, it always had to be the best brand. Mum insisted that the ‘3 Crab’ brand was the finest. Its clear, amber-coloured liquid was by far the most superior. There is always a bottle on our dining table — it never lives in the pantry.
Eat