1 tablespoon cornstarch (about 1/4 ounce; 7g)
1 tablespoon (15ml) water
2/3 cup (160ml) pineapple juice
1/3 cup (80ml) rice vinegar
1/3 cup (74g) light brown sugar
3 tablespoons (45ml) ketchup
1 tablespoon (15ml) soy sauce
In a small bowl, whisk together cornstarch and water. Set aside.
In a medium saucepan, combine pineapple juice, rice vinegar, brown sugar, ketchup, and soy sauce and bring to a boil over medium heat. Stir in cornstarch slurry and cook until thickened, about 1 to 2 minutes. Remove from heat and use immediately or store in an airtight container in the refrigerator for up to 2 weeks.