Preheat the oven to 500 degrees.
To spatchcock the chicken you first have to remove the backbone. This is not as hard as it sounds but you need a good pair of kitchen shears. A knife would be much more complicated, I think.
1 whole chicken
With the chicken breast side down, cut along one side of the backbone.
Once you cut through, repeat on the side.
Place the breast side down in your baking dish of choice and press to flatten. The only thing I had that was big enough was a large, heavy skillet.
Sprinkle the chicken with salt and pepper and set aside while you prepare the rest of the ingredients.
Kosher salt and ground pepper for sprinkling
Scrub the potatoes if you plan on keeping the skin on. You can peel them if you like I'm just a fan of skins in general.
2 sweet potatoes
Cut the sweet potato and onion in chunks about an inch thick. I'm not very particular here. I just chunk them. Place the sweet potatoes, onion, maple syrup, ginger, cinnamon and allspice in a bowl and toss everything together until the spices coat everything.
1 onion, 1 tablespoon maple syrup, ½ teaspoon ground ginger, ½ teaspoon cinnamon, ½ teaspoon allspice
Arrange the sweet potatoes around the chicken. My pan was a tiny bit overcrowded but it's all good.
Place the chicken in the preheated 500-degree oven and set your timer for 15 minutes. DON'T OPEN!
After 15 minutes remove and toss the potatoes. Not much change...
Place back in the oven and reset your timer for 15 minutes and again, DON'T OPEN! Let the smell fill your house and put a smile on your face.
Once your timer goes off remove again and toss the potatoes again - they should start getting softer at this point.
If your bird is closer to 3 pounds you may want to check the internal temperature and see where it is. A 3-pound chicken should only take about 30 minutes. Mine was 4.5 so I placed it back in for another 15 minutes. Again, set your timer and leave the darn oven alone!
Remove and check the temp. The juices should run clear when pierced between breast and the temperature should be 165 degrees in the thickest part of a thigh. Mine was perfect at 45 minutes and I only opened the oven 3 times!