A great sauce for dipping almost any Asian inspired dish in! Should you desire a thicker consistency than what this recipe yields, dissolve another 1/4 teaspoon of cornstarch in 1/8 to 1/4 cup of cold water. Once dissolved, stir the mixture into the sauce and continue to heat and whisk until sauce thickens.
In a small saucepan over a medium-low heat, whisk (using a metal whisk) together vinegar and cornstarch. Add oil, pineapple juice, ketchup, brown sugar, and salt; whisking constantly until the mixture is heated through.