What are some good meals to take to work?

My workplace is finally calling us back in to the office and with that I’ve just been wondering what are good (and healthy) options I can take.

The biggest thing is that over the last few years I’ve been a little too reliant on processed foods and junk food. I don’t want to screw over my health any more and want to make a change and adopt a moderately healthier lifestyle.

Open to different options and suggestions (with the exception of something like soup)

EDIT: Wow, I was not expecting some many responses! Thanks for the suggestions, everyone!