Could you tell me what kind of breakfast is a cooked breakfast?

Is it boiled or fried?

'She has a cooked breakfast.'

'A cooked breakfast' could be anything. More usually, I hear 'a hot breakfast'. It could be bacon or sausage and eggs (prepared any way), pancakes, oatmeal, steak & eggs, rice & miso soup – or whatever cooked foods are enjoyed by the ethnic group portrayed in your excerpt.
Teachers: We supply a list of EFL job vacancies
I see. Thank you. I just didn't understand what they meant in this sentence. I mean how it is prepared in this sentence.
The sentence reveals nothing about ingredients or preparation.