To make sweet potato fries, peel yams or sweet potatoes. Cut into long strips. I've found that cutting the potato in half, placing it on the cut side and then cutting into sections works well, especially with longer yams. Toss with olive oil, place on a baking sheet, sprinkle with salt and put in an oven at 375 degrees for 45-60 minutes. Turn once or twice to make sure they brown evenly.
This morning, while bemoaning the fact that I was trying to cut out caffeine (which includes my dark chocolate) I remembered that I had some left over fries in the fridge. They made a perfect (and easy) snack, without any residual guilt. Enjoy!