Crockpot Chicken Noodle Soup

Ingredients

For 8 servings

• 2 tablespoons olive oil (optional)
• 1 large onion (peeled, left whole)
• 2 large carrots (peeled and sliced)
• 2 stalks celery (optional, chopped)
• 1½ pound chicken breasts (bone in with skin on, 2 or 3 breasts)
• 1 cube chicken bouillon (or 2 teaspoons chicken base, or 2 tablespoons Vegeta)
• 1 teaspoon salt (or to taste)
• ½ teaspoon pepper (or to taste)
• 8 cups water
• 2 bay leaves
• ½ teaspoon dried rosemary (optional)
• 4 ounces wide egg noodles (dry, about 2 cups)
• ¼ cup fresh parsley (chopped, for garnish)