Actually, don't eat breakfast. Or at least, not at breakfast time. I only eat between 10 am and 6 pm and don't eat any refined sugar, simple carbohydrates or processed food.
A favourite Sunday "breakfast" is to knock up a sofrito (onions, peppers, carrots, celery, tomatoes, finely diced and cooked down slowly in olive oil) add garlic, butter beans, smoked paprika, lots of black pepper, maybe some chorizo or some bacon, add half a pint of pasata. Cook out then crack a couple of eggs on top, sprinkle on some cheese, cover with a lid and cook gently for a few minutes for the eggs to poach and the cheese to melt, then another drizzle of olive oil, throw over some chopped chives and parsley and dive in.
Followed by a cup of creamy barista coffee and another bowl of tobacco, probably a bit of best Brown Flake or maybe some Petersons Elizabethan mixture.