Out of town away from my usual farmers markets, I was cruising in a grocery store vegetable department. The sweet potatoes spoke to me but what I thought were "yams" were silent. Confused as to which was which, I bought sweet potatoes and headed to my laptop.
What I had thought was a yam was actually just another type of sweet potato. Real yams are a tuber that can grow to seven feet long, has a dark brown or black skin and very sweet red, pale, or purple flesh. I bet they all would make great oven fries. The sweet potatoes I bought sure did.