I started taking the peels of my orange and cutting/ripping them into a few smaller pieces and sticking them in a ziplock baggie in my freezer, and later throwing a piece or two in a protein shake.
I don't remember where I read here that the peels and rind are so good for you and contain most of the fiber and antioxidants in the fruit, but it's true, and it turns out if you stick about 1/8 of an orange peel in with your shake, it tastes friggin awesome!
It's great with those berry shakes, and even more importantly to me, it covers up the taste of spinach in a shake better than anything else I've tried- even the frozen spinach which tastes more pungent. It also eliminates the need to put fruit carbs in the shake if I don't want to, and allows me to stick more spinach & kale in my diet.
I like a scoop or two of Grow! Whey, water, 1-2 ice cubes w/ a bunch of fresh spinach OR a bunch of frozen spinach, about 1/8 orange peel, and a little stevia or splenda. Tastes like an orange julius. I also like adding in green tea powder (or even ripping open an organic green tea bag and dumping it in) for the antioxidants and the buzz, and the orange peel does a delightful job of covering up that taste as well.
It also makes blueberry/rasberry/strawberry shakes taste better too imo.
And even by itself in a shake, it tastes great:
-Grow! Whey or other protein powder
I will also be saving lemon and lime peels to try.
I started buying organic oranges by the bag- cheaper.
Anyway, for all of you that like putting spinach and green things in your shakes, seriously, try it. It's yummy.