METHOD
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Slice the potatoes
Clean and dry your sweet potatoes, then slice them as thinly as possible. If you have a mandolin, use it.
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Fry
Preheat the oven to 120 °C / 250 °F. Place a cast-iron pan (or any other heavy-bottom cooking pan) over high heat. Pour in the vegetable oil and heat until the oil reaches 175 °C / 350 °F. Add the thinly sliced sweet potatoes (use an aluminum basket for frying if you have it). Fry for about 2 - 3 minutes. Remove the chips from the oil and transfer them on a paper towel-lined baking sheet.
TipIt's important to regularly shake the pan the first minute to assure the crispiness. -
Bake
Replace the kitchen towels with the new ones and place the baking sheet into the oven. Bake for 8 - 10 minutes at 120 °C / 250 °F.
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Serve
Using a pestle and mortar smash the sprigs of rosemary and sea salt. Sprinkle the rosemary salt all over the sweet potato chips and enjoy.