We tend to have full fat Greek yoghurt with nuts, milled linseed, chia, nuts and sometimes a few raspberries or blueberries, it's very quick and easy during the week when we're in a rush to get up and get to work. At the weekend, we generally eat later, just have brunch not lunch, and we usually cook, some kind of eggs, poached with hollandaise, scrambled or an omelette, usually with avocado, sometimes fried mushroom, sausage or bacon. If we're going cycling that day, we will allow ourselves some nice protein rich bread toasted with marmalade and burn the carbs off.
I do miss porridge, and find I can still have it without raising my BG too high if I substitute about 1/4 with oat bran, use jumbo oats and make it with almond or hazelnut milk. I usually add a dollup of cream or Greek yoghurt.