Slow Cooker Potato Ham and Leek Soup

diced potatoes (I didn't peel my potatoes but you can peel yours, if you prefer them that way)

seasoned salt

leek, thin sliced and chopped (thin slice only the white and very light green parts)

unsalted butter

diced cooked ham

garlic, minced

chicken stock (no salt added)

half and half

all purpose flour