@writersoul – if you made an initial mezonos on slice, because you had only one slice in mind, then proceeded to eat another, you can eat it and then bentsch. Don’t forget to clean up when you’re done.
Note to the general public that I’ve already seen expressed in other threads: please don’t use psaks from the CR unless you’ve asked your LOR about it. Ask for sources. Many might be personal opinions. No offence intended to anyone. I’m sure you’ll all make great poskim one day.