Thanks for the link. IIRC, quinoa is a grain that is considered a complete protein.
True that it is a complete protein
When the Spanish conquered South America, they forbade the natives from growing it, since it made "Super Warriors".
However, technically it is not actually a grain ,.. it is a seed , and needs to be washed before using it.
The seed coating produces a bitterness that can be washed off, just by rinsing.
And after washing/rinsing, it is used as a grain with complete amino acid proteins, just as you would use wheat.
To cook, or bake with it, you use 1 cup of quinoa with 2 cups of water (sorta like rice, except that rice is a starch).
It is the healthiest grain-like substitute for those who are 'gluten intolerant', and is normally grown in Peru and other countries in South America.