Roasted Sheet Pan Chicken and Sweet Potatoes

split chicken breasts (bone-in, skin on)

olive oil (divided )

large apples (cored and cut in slices or large chunks)

large yellow onion (peeled and sliced in large chunks)

large sweet potatoes (peeled and diced)

salt (divided)

cinnamon (divided)

pepper (divided)

minced parsley (optional garnish)