Usually a thick slice of sourdough, dark rye bread, english muffin, or crumpet.
Toppings include Grilled Cheese, tomato paste grilled cheese and onion, peanut butter, peanut butter and honey, jam, cooked tomato or whatever.
Weekends usually have a couple of poached eggs on them, or make bacon and egg muffins or somesuch.
Cereal and milk leaves me feeling like garbage until around 11AM.