3 medium sweet potatoes (2 pounds total), scrubbed and cut into 1/4-inch-thick sticks
2 tablespoons extra-virgin olive oil
1/2 cup finely grated Parmesan
Coarse salt and freshly ground pepper
Preheat oven to 425 degrees. Toss together sweet potatoes, oil, and cheese in a large bowl until evenly coated; season with 1 teaspoon salt and pepper to taste. Arrange in a single layer on 2 rimmed baking sheets. Bake, rotating sheets and tossing sweet potatoes halfway through, until golden brown and crisp, 20 to 25 minutes. Serve immediately.