I made this recipe from epicurious.com last week to serve along with crispy oven fried fish. The fish was good, but not outstanding, but I really took a liking to these fries. They were tasty, with very little hints of garlic, and deeply satisfying. They are not really healthy, given how much oil they require, but definitely worth making for the flavor alone. In the original recipe they are served with fried sage, but I didn't bother.
Preheat oven 450°F with rack in upper third.
Put the olive oil, garlic and salt in a blender and puree until smooth. Place sweet potato rounds in a large bowl and pour the garlic oil on it, coat well.
Spread sweet potato rounds in 1 layer in a large baking sheet. Bake for 20-30 minutes, or until brown patches start appearing on top of the sweet potatoes.