Quick growing veg's in minimal space?

Hello everyone, I'm new here and hope you are all doing well, given the current situation.

This is my first real year of trying to grow things to eat. I have grown tomatoes before in a small greenhouse, which came with the house I moved into (nice bonus), and last year I got frustrated with the quality of greens at the supermarkets to use as stir-fry ingredients, so tried my hand at growing my own. It was early June when I got the impulse, so I had a lot of issues with bolting (a great learning experience), but I managed to get a fair few meals out of the experiment, and that feeling of doing so must have sunk it's teeth deep into my subconscious; because this year I seem to want to try and grow everything.

The rational part of my brain tells me I can't expect to grow it all, given the space I have, but my childish glee is generally winning at this point. I've been sowing things left, right and center, stuff that is new and exotic to me, like tomatillo's, cucamelon's (visually the cutest thing I have ever seen), trying the three sisters thing (don't even know what squash tastes like, honestly), lots of peppers, guava... Not much room left for rational growing, but I have quite a few long containers about eight inches deep, and some free space here and there.

So that's my situation. Apologies for the long winded intro, but I think context matters.

To the question: What would you green fingered deviants recommend for quick growing, possibly cut and come again crops that take up little room, or can be used as fillers in between other crops, or grow in containers? My personal experience so far from last year indicates mizuna (wow, that plant delivers), celtuce, spring onions and chives. I'm looking to broaden my experience.

Any suggestions and/or personal successes and fails would be very much appreciated.

Regards