Make this recipe a recipe that people in that category can eat. categories: ['low_fat'], recipe: combine cornstarch and water. set aside. in saucepan heat all remaining ingredients until sugar is dissolved and liquid is hot. slowly add the cornstarch and water mixture, stirring constantly until the mixture thickens, about 1 minute. remove from heat. serve warm or room temperature.

Target recipe: drain pineapple, reserving juice from pineapple. in a medium saucepan, combine sugar, can of tomatoes, onion, soy sauce, ginger and pineapple; simmer for 20 minutes. in a small bowl, combine cornstarch and reserved pineapple juice; stir till smooth. add to the cooked pineapple mixture when mixture is done cooking. bring to a boil and cook for about 2 minutes or till slightly thickened,remove from heat and cool. refrigerate till cold.