Kid-Approved Sweet and Sour Chicken Sauce

2 tablespoons cornstarch

½ cup water

1 (8 ounce) can pineapple, drained and juice reserved

¼ cup white vinegar or apple cider vinegar

1 cup white sugar

½ cup ketchup

2 medium carrots, chopped

Stir reserved pineapple juice, vinegar, sugar, and ketchup in a saucepan over medium heat until blended, 2 to 3 minutes.

Whisk cornstarch and water in a bowl until cornstarch is dissolved; stir into pineapple juice mixture.

Stir pineapple and carrots into the sauce; bring to a boil, reduce heat to medium-low, and cook at a simmer until the sauce thickens, about 5 minutes.