This recipe was orignially posted at http://www.copykat.com/2015/04/30/sweet-and-sour-sauce-2/ <br /> <br /> <br />Ingredients <br /> <br />5 cups water <br />1 medium orange <br />1 lemon <br />2 or 3 slices fresh ginger <br />1 cup sugar <br />1/2 cup vinegar <br />1 cup ketchup <br />Red food coloring if desired <br />3 tablespoons corn starch <br />3 tablespoons of water <br /> <br />Directions <br /> <br />Wash the orange and the lemon well. Slice the fruit and sliced ginger and place into a medium pot along with 5 cups of water. Bring the pot to a boil, and then simmer for 30 minutes. Drain water with a sieve, press the fruit into the sieve, you want to get all of the water released. Place water into a pot and add 1 cup sugar, 1/2 cup vinegar, and 1 cup ketchup mix until well blended with a whisk. Heat the sauce over medium high heat. <br /> <br />Combine 3 tablespoons corn starch and 3 tablespoons water in a small bowl. Slowly stream the liquid into the sauce stirring constantly. The sauce will thicken. When the sauce thickens remove from heat. Store unused sauce in an air tight container.