See Smoothie Basics (link) for details on ingredients / methods.
Unfortunately, I woke up with leg cramps today (and a cat trying to pounce on my feet). This smoothie is similar to the Funky Monkey with the chocolate and banana elements, but it emphasizes foods that are high in potassium (and reasonable for breakfast). A sweet potato topped with chunky tomato sauce would also be high in potassium, but I would eat this dish for lunch with a little sharp cheddar cheese. However, if you do want to throw half a cooked sweet potato in the blender, though, check out the Sweet Potato Smoothies.
About the chocolate almond butter: I used Kolat brand with dark chocolate and coconut. If this is not available in your area, you could use 1 Tablespoon plain almond butter and unsweetened cocoa powder to taste.
Makes about 20 oz.
1 cup coconut water
1 cup plain, fat-free Greek yogurt
60 g baby spinach (about 2 cups)
1 medium banana (about 4 oz.)
1 Tablespoon chocolate almond butter
Puree all ingredients in a blender until smooth.