Shingled Sweet Potatoes With Harissa

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   ["Preheat oven to 400u00b0F. Whisk 2/3 cup oil, 2/3 cup harissa, and 1 Tbsp. vinegar in a large bowl to combine. Slice sweet potatoes crosswise on a mandoline 1/8"" thick. Add to bowl with harissa mixture and toss to coat; season with salt.", "Arrange sweet potatoes so they are standing upright in concentric circles in a 2-qt. baking dish, packing tightly, and roast, brushing any accumulated harissa oil in dish onto sweet potatoes every 10-15 minutes, until soft and starting to brown on top, about 1 hour.", "Meanwhile, toss pistachios, sesame seeds, and fennel seeds on a small rimmed baking sheet. Toast alongside sweet potatoes until golden brown, about 4 minutes. Let cool, then transfer to spice mill or mortar and pestle and coarsely grind. Set dukkah aside.", "Whisk remaining 2 Tbsp. oil, 2 Tbsp. harissa, and 1 Tbsp. vinegar in a small bowl. Remove sweet potatoes from oven and brush with oil mixture. Sprinkle with reserved dukkah.", "Dukkah can be made 3 days ahead. Store airtight at room temperature."]

* Per serving · 4 servings · Values may vary.