Speculating about the quality of food on mars is pointless; we have no idea how that will work. If you can afford regular equipment shipments to mars (which is probably what a mars colony will require with near-future tech), it would probably make a lot of sense to ship up a bunch of spices. They have a very high utility/weight ratio, which is why they were the impetus for the foundation of so many historical colonies.

Those people can and do at least go to parks.

A better analogy is that it would be like living in an underground bunker on Death Valley, with periodic excursions out to the desert, while wearing a spacesuit.

Of course this will take many hundreds of years and need a bunch of new tech.

Anyway, for now, we can breathe the atmosphere when we go outside. That's not what it's like on Mars. I don't think I'd enjoy that.