Oats done as above or even better, mix with egg, sweetener and flavour of your choice (almond, vanilla, coconut) and baked in the oven/microwave. Nice seasonal variations of this e.g. add grated carrot/pumpkin and cinnamon.
Cereal and fruit is a good one, or try making your own granola and having with yoghurt and sliced banana.
Bacon/sausage and mushroom sandwich?