Place quinoa in a fine-mesh strainer, rinse, rub and swish under running cold water for about 2 minutes to remove natural coating.
Add rinsed quinoa, salt and 2 cups water to medium saucepan and cover with tight fitting lid. Bring to boil, reduce heat and simmer for 12 to 15 minutes until water is absorbed.
Cool quinoa and set aside.
In a large bowl, combine cooled, cooked quinoa, corn kernels, beans, peppers, green onions and cilantro or parsley.
Dressing
Combine oil, lime juice, garlic, cumin, coriander, salt, black pepper and cayenne pepper in a well sealed jar.
Shake vigorously.
Pour over quinoa mixture to evenly distribute.
Serve cold.
Notes
Lots of room for variations! Add avocado, tomatoes, cheese, change the color of peppers, the type of beans, even the type of grain/seed (eg from quinoa to brown rice).