To make the batter, whisk together the rice flour, turmeric and cornflour and season with salt, a teaspoon of MSG (optional) and a pinch of white pepper.
Mix together the creamed coconut and 400ml boiling water.
Add the dry and wet ingredients together, whisking until smooth, and then stir through the sliced spring onions.
To make the dipping sauce, add all the ingredients to a small bowl and stir to combine.
To cook the mung beans, add them to a pan of salted boiling water and simmer for 20-30 minutes until soft. Set aside.
Slice the pork belly as thinly as you can into slivers.
Add a little sunflower oil to a frying pan and add the crushed garlic, prawns and pork belly. Fry for 3-5 minutes until the pork belly and the prawns are nicely browned. Set aside
Now make the Bánh xèo. Heat a large frying pan over a high heat. Add a teaspoon of sunflower oil and use kitchen paper to wipe it around the pan, creating a very thin layer.
Add about half a ladle of the pancake batter to the hot pan (it should sizzle) and move the batter around the pan to cover the base of the pan. Cook for about a minute. When bubbles appear, carefully flip the pancake and cook for a further 30 seconds to a minute.
Add a small handful of mung beans, the prawns, pork and beansprouts to the pancake. Continue to cook until the edges of the pancake are really crisp. If you want to, drizzle a little more sunflower around the edges of the pancake at this stage. Fold the pancake in half to create a half moon and cook for another 30 seconds or so until the pancake is crisp and golden on both sides.
Serve the Bánh xèo straight away with herbs, lettuce and rice paper to eat alongside.
To eat, slice the Bánh xèo into strips, place the strip inside the lettuce leaf or rice paper and add herbs. Dip into the Nuoc Cham and enjoy!