A cheese toastie is a popular snack or meal made by grilling or toasting bread filled with cheese. The bread is typically buttered on the outside to achieve a crispy, golden crust while the cheese melts inside. Common types of cheese used include Cheddar, Mozzarella, and Swiss, but variations exist based on personal preference. Cheese toasties can be customized with additional ingredients like ham, tomatoes, or onions for extra flavor. They are often served with condiments such as ketchup or mustard. This simple dish is enjoyed in many countries and is known by different names, including grilled cheese sandwich in the United States.