Fried Sweet Potatoes

Sweet potatoes are preferred over regular potatoes in the diabetic recipes.  At the Elephant Bar Restaurants, there are two types of French Fries.  One made from Russet potatoes and the other from sweet potatoes.  I used the "sweet potatoes".  Caution:  watch the peanut oil temperature.  I think I would prefer to cook them in an electric fryer with auto temperature control to keep it at 325'F when blanching and 375'F when frying to avoid sugar burn.  I also would like to learn how to get those thin crispy crusty outer shell on those fries.  The thought of the process and clean-up opted me to just 'go and enjoy' it at the restaurant.