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. Common types of cheese used include cheddar, mozzarella, and Swiss, but variations exist depending on personal preference. Cheese toasties are often enjoyed for their gooey, melted cheese and can be customized with additional ingredients like ham, tomatoes, or onions. They are a favorite comfort food in many countries, particularly in the United Kingdom, where they are sometimes called a cheese sandwich or grilled cheese.