You will get a full breakfast after takeoff. App is yogurt, fruit and bread; entrees are typically a choice of: rubbery omelet, super-sweet french toast/pancakes (often stuffed with a fruit concoction), or a massive bowl of cheerios (safest & my recommendation). Then they roll out the normal BE dessert cart which is just a weird time to eat an ice cream sundae. One time on morning LHR-DTW the FAs improvised in a very smart way by holding off the dessert course until about halfway through the flight - a sundae makes a nice midflight snack. After learning that trick I will sometimes ask them if I can have the dessert course later in the flight, usually they say yes.
Pre-arrival will be the standard salad or sandwich.
I believe it's actually called "brunch" on these flights, and there's usually at least one savory item on the menu - normally a pasta.
I think there's also usually a steak-and-eggs preparation.
True about the ice cream, though....