Question:
Do you need to eat a kezayis of the bread you made hamotzi on?
For example, at seudah shlishit, if you have two shalem less tasty breads and one half-eaten tastier bread – after saying hamotzi on one of the shalems, is it ok to eat the kezayis from the half-eaten tastier bread that you didn’t say hamotzi on ?
Answer:
Although there may be a preference to eat the actual piece of bread that was cut off the bread after saying hamotzei, because it has a certain kedusha to it. However you may eat the rest of the kzayis from any other bread that you like.
Best wishes