Slow Cooker Sweet Potato and Apple Soup

lbs sweet potatoes ($1.58)

stalk celery ($.10)

onion, finely chopped ($.20)

apple, peeled and thinly sliced ($.88)

Salt and pepper,

Pork Broth or water (free!)

Asparagus ($1.18)

Extra Virgin Olive Oil ($.05)

Homemade Buns ($.48)