People tell me that you can turn any smoothie or shake into a snack loaded with vitamins and antioxidants. The idea is to sneak vegetables (spinach, cauliflower, kale, beets, or other healthy veggies) into the beverages of unsuspecting drinkers. They think they’re only imbibing their mango and honey treat, but they’re also downing green veggies. The beverage may be in the form of a smoothie, but the substance is something far different.