In a double bottom sauce pan, combine all ingredients on medium high heat. Bring to boiling point then reduce the heat immediately to medium-low setting, simmer the mixture for 10 minutes. Let ginger and garlic steep in the mixture for an hour. Then strain the liquid and store in an airtight container for up to 2 weeks in a fridge.
Before turn off the heat, at the slurry in and give the mixture a few stirs. The sauce should coat the back of your spoon perfectly. Let ginger and garlic steep in the mixture for an hour. Then strain the liquid and store in an airtight container for up to 2 weeks in a fridge.
If the sauce becomes too thick after refrigerating or at any point, add 1 to 2 tbsp of water or pineapple juice to thin it out.