Whisk orange juice, soy milk, sugar, arrow root starch, vanilla, turmeric in a heavy bottomed sauce pan. On medium heat, cook for 2 minutes whisking continuously until heated through and steamy. Reduce the flame to low and cook for 5 more minutes stirring continuously. You may have to use a fork after a while as the mixture thickens considerably. When the mixture is thick and pudding like, take off the heat and remove it into a bowl. Let cool for 10 minutes, cover and refrigerate for at least 1 hour. The mixture will thicken further as it cools.