I have full fat Greek yoghurt with pumpkin, sesame and sunflower seeds and milled flaxseeds, then an extra “topping” of either a few berries, some flaked almonds, some flaked coconut or a spoonful of peanut butter. I missed the texture of cereal/muesli, so all the seeds really help with that, and then the toppings give some variety from day to day.
Incidentally I generally have Lidl’s own-brand Greek style yoghurt which comes in a big 1kg bucket, but sometimes treat myself to their genuine Greek yoghurt which comes in a smaller pot and is more expensive (and tastes really good -it has added cream!)