If the pots are large enough you should do well with a lot of soft fruits [no trees though.]It's all about feeding and moving them so they get the sun.Strawberries grow easily, and although it's big, I have grown both rhubarb and courgettes this way in the past.If you haven't got much room, always grow things that are expensive to buy [ie not potatoes or carrots/onions.] That's what we used to do.Asparagus, spring onions and so on.Good luck. read up about the correct feeding [and when to feed and water.]