Toss pork with fish sauce and 1.5 tbsp cornflour, then coat in 1/2 cup cornflour, shake off excess. Cook in 2 batches for 3 min until golden, remove from oil. Simmer sauce 3 min, toss to coat pork, serve.

Toss the pork with the fish sauce, then the 1 1/2 tbsp cornflour. The coating should be a bit sticky.

Crispy coating - Sprinkle over the 1/2 cup of cornflour and toss with fingers to coat each piece, separating pieces stuck together. Give each piece a light squeeze in your fist to make the cornflour stick - you can do 2 or 3 pieces at a time in each hand. Drop into a colander, then give it a shake to remove excess cornflour - important step. (Note 4)

Heat 0.5 cm / 0.2" oil in a non-stick pan or large pot over high heat - dip a piece of pork in, it should sizzle straight away.

3 minute cook - Spread half the pork in the oil. Cook for 1 minute undisturbed until golden. Flip then cook for another 2 minutes (3 minutes in total, including time it takes to flip) or until golden and crisp. Don't overcook - tenderloin is lean!

Drain - Remove with a slotted spoon onto a paper towel-lined tray to drain. Cook remaining pork. Taste-test one "just to check" crispiness!;)

Sauce - Pour out all the oil (strain and re-use, it's very clean). Return the pan to medium heat. Add the Sauce ingredients, stir and let it simmer for 2 minutes until it thickens into a syrupy consistency.

Quick toss - Add pork, toss quickly to coat.

Serve immediately over rice, sprinkled with a little coriander and a lime wedge. I like to serve it classic Thai street-food style with plain tomato and cucumber wedges (no dressing) - the freshness is great with this dish!