Toast the salt flakes in a hot pan until they start to brown - it's very important to do this to get the true salt and pepper flavour.
Mix the toasted salt and all the other spice mix ingredients together.
Coat the pork evenly with the spice mix, then refrigerate for an hour or so to allow to marinate. You can do this in advance.
Spray a frying pan with low calorie cooking spray and place over a medium to high heat.
When the pan is hot, add the pork, onion, peppers and garlic and fry until the pork is almost cooked through.
Add the soy sauce and rice vinegar and let it simmer for a couple of minutes, stirring to make sure everything is coated.
Once the pork is cooked remove from the heat and serve with rice and stir fried vegetables.