Empty a 150 gm packet ( or similar size) of rice noodles into a bowl and pour over boiling water. soak until the noodles are soft and pliable (they won't be cooked any further). Drain, cover and set aside.
Add the cleaned and soaked coriander stems and roots, green onions, ginger, turmeric, garlic, tamarind paste, peanuts and stock into a food processor or machine and whizz till they are chopped into a paste. Pour into a saucepan with the coconut, 250 ml chicken stock, fish sauce , lemon and soy and set aside.
Heat a skillet or fry pan to very hot. Add the oil and the Pork Loins. Turn when golden on both sides.
Remove from the pan and put onto a plate.
Add the sugar to the pan immediately with out cleaning. You can turn it down just a fraction if you like. Add 1 tablespoon of the stock or water just to loosen the sugar and start it caramelising. Move it about a bit with a wooden spoon to keep it browning to a caramel evenly.
Once it is a deep caramel colour add the extra clove of garlic and chilli, stir then add the extra chicken stock to stop the caramel browning further. It will splutter. Be careful. Take off the heat and stir in the lemon juice and the fish sauce and stir well. It's ready.
Slice up the pork and add to the caramel tossing about to coat. set aside
Put the pot with the Peanut Coconut Sauce onto the stove and add soy, lemon and fish sauce. Stir and then add the broccoli and corn. Simmer till just tender.
Divide the noodles between four bowls. Spoon over the Broccoli, corn and sauce. Divide the pork amongst the bowls and add extra caramel sauce.
sprinkle with coriander and sliced shallots