Roasted Spatchcocked Chicken with Potatoes
Ingredients:
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1 serving cooking spray
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2 sweet potatoes, sliced very thinly
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2 Yukon Gold potatoes, sliced
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1 large onion, sliced
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1 (2 to 3 pound) roasting chicken
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2 tablespoons olive oil, or to taste
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1 pinch salt and ground black pepper to taste