Usually, a take little bit of soya drink + caffeine free coffe + cocoa + some cereals or some bread...
But lately enjoy a great combination of this 4 elements: 1 yogourt (or curd) + 1 chopped banana + some oatmeal + some raisins.
Sometimes I added some other things like cinnamon, sesame seeds, almonds, nuts or whatever i have there.
But those first 4 elements alone are a good for me.
Traditionally, in UK Germany, etc. Breakfasts are strong, so perhaps my breakfast results too much small for you.
There is known in most of our countries about 1/3 of food is throwed away
So sounds great to my reading some of you take advantage of left over food. I do it also, but not usually for breakfast. I can not support the idea to throw away food, and i always use it.
