Oven Baked Sweet Potato Fries Ingredients Conversion 2 medium sweet potatoes Nonstick cooking spray 2 Tablespoons fresh herbs (your choice) 30g Black pepper to taste, freshly ground sweet paprika to taste Cayenne pepper sea salt Directions : Preheat the oven to 450°F (230C – Gas Mark 8) Slice the sweet potatoes lengthwise into ¼-inch-thick slices. Cut the slices into ¼-inch-wide sticks or a little wider. Place the sweet potatoes in a large bowl, and sprinkle generously with sea salt. Let stand for about 20-30 minutes to dry the slices out a little or spread them out on paper towels to absorb any excess moisture. Then place them in a large bowl, and spray them with cooking spray. Sprinkle with the herbs, salt, pepper, paprika, and cayenne to taste. (Note: you can use thyme, marjoram, garlic powder, oregano or other herbs of your choice.) Spread the potatoes out on the prepared baking sheet. Bake the fries until they are golden and tender, 35 to 45 minutes. Serve immediately.