Roasted Spatchcocked Chicken with Potatoes

Ingredients (8)

• + 1 serving cooking spray add to pantry
• ✓ 2 sweet potatoes, sliced very thinly
• + 2 Yukon Gold potatoes, sliced add to pantry
• + 1 large onion, sliced add to pantry
• + 1 (2 to 3 pound) roasting chicken add to pantry
• + 2 tablespoons olive oil, or to taste add to pantry
• + 1 pinch salt and ground black pepper to taste add to pantry
• ✓ 1 pinch salt and ground black pepper to taste