Place slices in casserole dish blenderize orange juice, dates and cornstarch until smooth cook in small saucepan over medium heat until mixture thickens, stirring constantly.
3
Remove from heat.
4
Stir in orange peel pour sauce over yams in casserole dish.
5
Cover with foil bake at 400°F for 45 minutes remove foil and continue baking basting frequently with sauce, about 15 more minutes garnish with orange slices and sprigs of mint.
6
Note this can be made a day ahead of time and kept refrigerated until ready to bake.