Mix the marinade ingredients in a shallow baking dish, then put the loin in it and rub with the marinade all over.
Marinate for about 2 hours, regularly turning the meat.
Heat the oven to 170°C.
Cover the dish with foil, then bake in the middle of the oven for 10 minutes. Remove the foil and spread the sweet chilli sauce on top of the pork.
Turn up the heat in the oven, or switch to grill setting and cook for another 8-10minutes, until golden brown. Don’t overcook it - the inside temperature of the meat should be around 60C.
Place the loin onto a plate, cover and rest for 10 minutes, before slicing it. Meanwhile, reduce the cooking jus to a thick sauce (you can add more soy sauce, lime juice, rice vinegar, sweet chilli sauce and stock to it, if there isn’t enough jus).
Serve with the sauce and chopped coriander leaves.