Thanks ladies for the advice!

I have never seen those round carrots, will look for them. I have yet to look at my seed catalogue - scared of getting sucked into it and to never return to my dissertation!

I should just add that I will be able to use some indoor space, perhaps even in the sun, on our parking spot. We have a tiny car so I'll be able to put a few pots there. Cherry tomatoes sound good! Would you buy a plant or start one from seedling yourself?