I tend to not eat till 12ish these days, but if I’m particularly hungry I will have breakfast. Usually Greek yoghurt as has been suggested, with berries and I add nut butter, seeds etc, whatever is around.
I also will have a mint or ginger tea with a dose of the nutrition geeks collagen stirred in. I’m not convinced of the purported benefits honestly but I keep going regardless. And it does have a lot of protein if that matters to you.
Other ideas -
Beans on toast, maybe sausage with it - ger the chicken sausages if you’re worried about calories
You could make pancakes without eggs - cottage cheese, flour and whatever additions you fancy, maybe berries, or add some spices/ grated veg. Disclaimer I’ve not tried this, it’s on my
list to try one day after seeing some recipes online!
You could spread cottage cheese or ricotta on sourdough or whole grain toast and top with tomatoes/ spinach/ sautéed mushrooms or peppers - whatever you fancied
Chia pudding - it’s a bit like overnight oats I guess but soak chia seeds in your choice of milk and some squashed raspberries overnight. Add a tiny bit of honey/ maple syrup if you don’t mind a little sugar or skip if you want to avoid altogether. Squeeze of lemon juice. Serve in the morning with Greek yoghurt or quark. Used to make this for DD and was surprised how much I enjoyed to too.
If you’re not into overnight oats you might like baked oats instead? My recipe uses egg but there’s egg free recipes out there.