You can't do St. Patrick's Day without a green feast! Skip on the regular old food coloring when dying everything green and opt for something more natural. In anticipation of St. Patrick's Day, we whipped together some green food color made from spinach. It's an easy recipe to recreate and will make your food more festive. Use it for a variety of dishes, including mashed potatoes, oatmeal, and even dessert. Click for the full directions.