Preheat oven to 425°. Lightly oil a large baking sheet. (A misto spray with olive oil is ideal. This is just to prevent sticking.)
Peel potato (optional). Cut it in half lengthwise. Slice each half into small rectangles. Place them on the baking sheet.
Drizzle fries with olive oil. Season with generous pinches of sea salt and freshly cracked black pepper. Sprinkle with herbs de Provence. Toss fries with your hands, coating each one well. Spread evenly across the pan. Don't allow fries to touch much or they might steam and get mushy.
Bake for about 30-35 minutes. Half-way through cooking, briefly take them out and turn them. They are ready when they're a bit golden with crisp edges.
Instructions
Recipe by Mamaguru at http://mamaguru.com/making-groceries-sweet-potato-fries/