Reduce heat to low and simmer covered for 45 minutes or until grains are cooked and water is absorbed. Fluff with a fork and let sit covered for 10 minutes.
While the grains are cooking, prepare other ingredients.
Sauté onion in olive oil until translucent, about 7 minutes.
Blanch kale.
Transfer grains to a large bowl; add onion, yam, walnuts and kale. Mix well.
Add vinegar and olive oil to your taste.
Notes: Make this salad you own by tossing in any additions you like such as diced boiled beets, dried cranberries or fresh rosemary.