I will start with something as simple and as sophisticated as a green smoothie. As the name suggests, it is usually green. It is technically a veggie smoothie, but sometimes I like to add some color changing healthy ingredients and it turns brownish-reddish with some green hue to it. 

The green color gives the vibe of renewal and awakening, which sets the mood for the morning. It usually made from vegetables and greens with some fruits to balance the taste.

If we are talking about a complete meal replacement, a green smoothie for breakfast, we need to make sure to use the right ingredients to make a well-balanced meal replacement. Nutritionists advocate for good carbs, good proteins and good fats (1).

There are many sources of good carbohydrates to choose from (2, 3, 4, 5). Keep in mind that you will have to rotate the ingredients in your smoothie at least weekly. That is why you should come up with your own list of possibilities.

Here are some of the ingredients I use, to name just a few, to provide a quick reference.