Mystery Food #2!

It's time for another mystery food! Let's hope this one is not as much as a flop as the last one. In fact, let's say the winner gets something special.

I am a gluten-free whole grain, but a good source of protein as I contain all 9 essential amino acids. I am high in fiber, antioxidants and phytonutrients. My name is not pronounced the way it looks like it should be. What am I?