There is another aspect – – that it may be that the rishonim in paas habah b’kisin are merely examples of snack-bread, but the real principles is it meal-bread, or snack bread. Is it meant to be filling? If that’s the case, one could say that pizza is a filling food, and even when you are not be koveah suedeh, you would have to wash, just like regular bread. A similar line of reasoning could be made for a bagel dog – even though it’s memulah, it’s meal bread. Or pancakes. Or blintzes. All would have this question. They are memulah, and may even be made with fruit juice, but it could be that that is not the crux of the issue, but the issue is – is a single blintz a snack? Or is it a meal food, merely you are snacking on it.
Is pizza beztem a snack food – like cake ? Isn’t it betzem a meal? I mean, you could also eat bread as a snack.