This recipe was submitted by Jennifer Plantenberg to the September 2012 issue of Vegetarian Times. It is a very easy recipe and very tasty. I made it with actual sweet potatoes, but think that it would be better with yams. All you need to do is chop of the sweet potatoes and onion(s). Toss with oil, salt, cumin and paprika. (I happened to have a smoked paprika, which gave an amazing flavor). Squeeze half of the lime juice and roast 45 minutes to an hour (check at 30 mins and stir, toss and rotate) at 425 degrees. When then are done roasting, just squeeze the other half of lime on them, adjust seasoning and garnish with cilantro. Yum!