America is on a health kick lately, making fresh smoothies using greens like spinach, kale and parsley. But if you're finding it tough to always have a stash of fresh greens on hand since they can wilt quickly in your refrigerator, try freezing them. Not only does freezing greens prolong their life, it's pretty easy to do in one simple step. Fill a blender with washed greens. Then add 1 cup of filtered water. Blend for one minute, and pour the mixture into muffin tins or ice cube trays. Freeze and store your cubes of greens in airtight freezer bags or BPA-free storage containers and toss them into the blender when it's smoothie time!