In a bowl, mix together all the sauce ingredients. Taste and adjust to your preference; this is also important because different brands of rice vinegar will sometimes vary in level of sourness. There should be a good balance of salty, acidic, sweet, spicy, and nutty flavors (from sesame oil). I prefer mine on the sour side so I like the extra tbsp of rice vinegar!
3 cloves garlic, 1 tbsp soy sauce, 2-3 tbsp rice vinegar, 2 tsp sugar, 2 tsp chili oil, 1 tsp toasted sesame oil, tiny sprinkle of salt