Let's be honest. Sometimes when we say "smoothie," we mean dessert masquerading as breakfast. Not so for this lean green smoothie, which is packed with nutrients and nutrients only. Don't be fooled, though. It's also delicious. The mango flavor dominates, with the arugula, lemon, and ginger spicing things up just enough to keep it interesting. The observant among you will notice that I used spinach instead of arugula on picture day, because that's what I had on hand. Use arugula or another peppery green, though, if you have it. It really makes a difference.