Quinoa is often thought of as a grain but it is actually a seed. This seed is very popular as a source of protein and fiber, and for good reason. One cup of cooked quinoa has 8 grams of protein. Quinoa can be cooked in different ways and is very complimentary as a side dish for many meals, especially those you would normally serve a rice with. Quinoa is also gluten-free and very low fat.