If you've never made a panzanella salad, well you're surely missing out! Its origin is from the Tuscan region of Italy where it was originally made with stale bread, onions and olive oil. Later, cucumbers and tomatoes were added to create a sort of salad. It was also a way to use old bread without discarding it.
As you'll see below, I'm not including any exact measurements, as this recipe is truly intended for you to make with what you have available and in whatever proportions you desire. And if you've never made croutons at home, stop everything you are doing and MAKE THEM. Please don't ever buy those nasty things from the store in a bag. Once you make them at home, you'll never go back.