Slow Cooker Cauliflower Chowder

head cauliflower, cut into florets

slices bacon, optional, cooked and crumbled

garlic, minced

stalks celery, chopped

yellow onion, finely chopped

chicken broth

sharp cheddar cheese, grated, divided

heavy cream

bay leaf

dried thyme

rosemary, minced

kosher salt and freshly ground pepper,

fresh chives, minced, garnish

oyster crackers, garnish