What I sometimes have for breakfast:-
eggs - boiled, fried, scrambled. Omlettes with any filling/s
bacon on its own or rolled up with cheese inside (yummy)
mushrooms on their own or filled with cheese & tomato or whatever you like
Sausages - high meat ones - I love Bratwurst (I think they are german)
Kippers, sardines or mackerel (tinned for quickness is just as good)
Full fat greek yoghurt with strawberries, raspberries, blueberries or nuts and seeds with double cream poured over the top
Sometimes simply slices of corned beef or ham and cheese and I usually have a cup of earl grey tea to wash it down.