Sweet Potato and Cranberry Stuffing

butter for dish

butter

olive oil

large sweet potato (, cubed (about 4 cups cubed sweet potato))

large carrots (, sliced into chunks about the same size as the sweet potato cubes)

yellow onions (, each onion sliced into 4 wedges)

salt and fresh pepper (, to taste)

rosemary sprigs

fresh cranberries

water

dry bread cubes ((unseasoned))

vegetable or chicken broth