Heat oranges, juice, sugar and vanilla over medium to high heat. In a small bowl, stir together cornstarch and water. When orange mixture comes to a boil, stir in cornstarch mixture. Cook stirring constantly until thick. Keep warm and set aside - this is your Mandarin Orange Sauce to pour over your pancakes.
For your Citrus Pancakes:
Mix together the buttermilk pancake mix, orange juice, water, and zest. Drop by spoonfuls on heated griddle. Flip when bubbles begin to break. Remove when bottom is browned and pancakes have puffed. Serve with warm Mandarin Orange Sauce and Enjoy! Chef Gary