Note:
If you are using dry shiitake mushrooms, soak them in warm water before use.
Thai red chilli is very spicy and hence we add some sugar to balance with some mild sweetness. The Red chilli & garlic would give the best flavor when they are ground in mortar pestle rather than mixer.
Most important point to note is the soya sauce already comes with lot of salt in it. Hence you need to be careful while adding extra salt.