To prepare a sweet potato fries with curried mayonnaise dip appetizers recipe, first you need to prepare the sweet potatoes. First, you'll need: Sweet potatoes: Cut the potatoes in half lengthwise and scoop out the seeds. Cut each half into 1/4-inch-thick slices. Toss the slices with olive oil and season with salt and pepper. Bake in the oven at 400?F (204?C) for 20 minutes.