1/2 cup ketchup
1/2 cup rice vinegar or white vinegar
1/3 cup sugar
1 tablespoon soy sauce
1 tablespoon cornstarch
2 tablespoons water
1/4 teaspoon garlic powder
1/4 teaspoon salt
Combine ketchup, vinegar, sugar, soy sauce, garlic powder, and salt in a saucepan
Mix cornstarch and water in a small bowl until smooth
Heat the saucepan over medium heat
Stir in the cornstarch slurry
Cook while stirring until thickened
Remove from heat and let cool slightly