Weetabix here, sometimes with pureed fruit although he's on a low-fruit diet atm due to his pooing at night issues. Then a banana and afterwards if he's still hungry he gets yoghurt and/or toast.
Mid morning he gets a handful of my cereal (cheerios and crunchy nut cornflakes are popular!) and a flapjack (homemade) or biscuit
Lunch is scrambled egg, soup, sandwiches (peanut butter, sardine in tomato sauce, hummus, tuna mayo) or cheese on toast, jacket potato (useful if out, we share) or leftover dinner. Then a yoghurt if he hasn't already had one and more fruit, a pear or satsuma
Mid afternoon half a bagel or a honey sandwich or half a muffin in costa shared with me
I also have a big eater 