Used to do a Sunday brunch thing,
fried mushrooms, beans, hash browns, vegan sausages, veggie haggis. Haggis can be prepared in advance and is just boiled lentils and barely mixed with some oats in melted soya marge with fried onions to flavour. Hash browns just grated potato, see magi mix, with a drop of flour. All this can be done on the double hob but the biggest problem is psace and keeping things warm, we used to have a four way ban marie.
Also yes to granola with Greek style yoghurt honey and walnuts. Guess you could offer a few varieties with different fruits etc.