Crockpot potato leek soup

Ingredients

• 6 medium potatoes
• 2 leeks
• 1 cup chopped onion
• 1 carrot
• 1 stalk of celery
• 4 cups chicken broth
• 1 tablespoon dried parsley flakes
• 1 teaspoon garlic salt
• 2 tablespoons butter
• 12 oz can evaporated milk
• 12 oz bacon
• sharp cheddar cheese
• chives