In a small bowl, combine all ingredients. Whisk until sugar is dissolved.
Let it stand for 30 minutes, but best overnight. Do a taste test. Add more sugar or water based on preference. Start with 1 tsp at a time. Note that water will help lessen the sourness of the sauce. Use less, if preferred.
Pour in an airtight glass container and keep in the fridge until needed.
Serve with lechon kawali, lechon pork belly roll, BBQ, fried fish and other seafood.
