This is pretty similar to the stuff you'd dip thai rolls in. I'll also be posting a grilled chicken recipe that works well with it but really you could dip anything you want in it.
In a medium sauce pan boil and reduce (about 30 mins) the following to about maple syrup consistency:
1 cup sugar
1/2 cup white vinegar
1/2 cup water
2 tablespoons minced garlic
1 teaspoon salt
after reducing mix in 1-2 tablespoons of tuong ot toi (the same makers of rooster sauce) and serve at room temp.
if you save some in the fridge it gets really thick. I've found mixing in a little bit of boiling water loosens it up nicely.