Roasted Butternut Squash and Apple Soup

lbs. whole butternut squash, (halved lengthwise and seeds removed)

butter, (divided)

medium Granny Smith apples, (divided)

medium onion, (chopped)

fresh sage leaves

chicken broth

apple cider, (can substitute apple juice too)

water

kosher salt

freshly ground pepper

large pinch cayenne pepper

half and half

yogurt, (for topping, if desired)