Crockpot Potato and Corn Chowder

red potatoes, cut into quarters or eighths

frozen corn

large carrots, chopped

stalks celery, chopped

large onion, chopped

stock (vegetable or chicken)

water

minced garlic

dried thyme

dried oregano

garlic powder

kosher salt, more to taste

ground black pepper, more to taste

Tbl. flour

Tbl. butter

Grated Monterey Jack cheese, green onions and croutons, for garnish