citrus breakfast smoothie

i haven't grapefruit in such a long time, but they were on sale the other day so i picked a few up. this is super citrus, super healthy breakfast smoothie packed with lots of vitamins. you can add a little sweetener if you like, but i thought the orange and rhubarb mellowed out the grapefruit tartness enough. but i tend to like things less sweet, so adjust according to your taste.

• 1 red or pink grapefruit, peeled
  
• 1 navel orange, peeled
  
• 1 quarter cup rhubarb
• 1/3 cup ice
• stevia/sweetener (optional)
  

i put everything in the blender and pulsed until the ice was significantly chopped. then i put it on the blend/puree mode and let it go to work. my grapefruit and orange were super juicy so i didn't need any water to aid the blending, but if you do, just add a tablespoon at a time to get it going. again, add a little sweetener of your choice if it's too tart.