Breakfast ideas

Hi everyone :) Turns out that oats do not agree with my body very well, so I sadly had to cut that out of my breakfast routine. Now it's just a bagel or toast with peanut butter and jam, but I'm feeling a lack of a "larger" part of the breakfast meal, something to tide me over longer

Wanted to ask if anyone had suggestions, or better, what everyone eats for breakfast :)

Thanks!