How can I make 'Santon sauce' My local Chinese restaurant (Happy Chef on King St, Sydney for anyone who's interested) does a very simple dish of a half crispy skin chicken, served with rice and a sauce that they call 'Santon sauce'. It's the most ludicrously tasty sauce I've come across, but I have no idea what the magic ingredients are. Here's what I know:


It's about the consistency of, say, fish sauce or wine.
It's a clear, pinkish red, about the colour and transparency you'd expect from a red wine vinegar.
It's quite sweet, a bit sour, moderately salty.
The non liquid ingredients are shredded chillies (which have probably soaking in the sauce for a while as far as I can see), shredded coriander (cillantro) and sliced spring onion (scallions).
It has a strong, almost pungent taste which I think comes from something other than the chillies (although they undoubtedly contribute).
I have a reasonably decent knowledge of oriental flavours, but there is at least one flavour component which I'm completely unable to identify, or even say what it's similar to (not helpful I know!). I think it's some sort of herb or spice, which does something similar to fenugreek in terms of its flavour curve (lots of presence in the aroma, initial taste, slow fade).


Santon sauce appears to be just a name used by this particular restaurant; I can't find reference to anything similar online. Does anyone recognise it or have any suspicions?

Ingredients it might contain:


Sweet rice wine
Rice wine vinegar
Fish sauce?


Ingredients it probably doesn't contain:


Soy
From what you have described it sounds like Santon sauce may be a variation of Shandong sauce which is often served in Chinese restaurants alongside Crispy Skin Chicken. Here is a basic recipe that can be found on many internet sites. Perhaps it can be a starting point for you.

2 garlic cloves, finely chopped
2 chilies, finely chopped (I finely strip them rather than chop)
2 scallions, finely chopped (I thinly slice them)
1 tsp sugar
1 tsp sesame oil (I always use the light version)
2 1/2 Tbl chicken stock
Pinch of MSG
3 tsp dry sherry
2 tsp wine vinegar 


Heat a wok and add the garlic, chilies, onions, sugar, and sesame oil. Stir fry for 1 minute. Then add the chicken stock, MSG, sherry and vinegar.
Bring to a boil and then simmer for 20 seconds.


I have found that the flavor varies depending on the type of chilies, sherry, and vinegar used. You can try different types of each to get the particular flavor profile you are looking for. 

If you try this and get the taste you want I would be interested to know the final ingredients.