Which ingredients are in the ham and cheese omelette?

The ham and cheese omelette includes egg, cheddar/jack cheese mix, and ham, which makes option A the correct choice. The primary components of an omelette are the eggs, which provide a rich and fluffy base. The cheddar and jack cheese mix adds a creamy texture and a blend of flavors that complement the savory taste of the ham. Ham is a classic ingredient in omelettes, known for its salty and meaty profile, which enhances the overall dish.

In contrast to the other options, the ingredients listed do not reflect a traditional ham and cheese omelette. For example, using mozzarella or turkey instead of ham does not align with the classic preparation, as mozzarella usually brings a different flavor profile and texture, while turkey is not typically associated with this type of omelette. Similarly, salami and Swiss cheese would change the dish significantly by substituting the key elements that define a ham and cheese omelette. Therefore, the combination in option A perfectly represents the expected ingredients for this popular breakfast dish.