Interesting info on growing watercress, I must look into doing that.

Otherwise, anyone tried Purslane? I did one year and it seemed quite pleasant in terms of texture, but not terribly abundant. I *think* there may be a winter variety (will check).

Rocket does seem like the best option so far. Even better if it's a prolific self-seeder. Even though I love watercress, I do resent buying bags mostly full of air. A couple of handfuls and the contents are virtually gone.

I do grow Sorrel, it's more sour than spicy, which is good in it's own way. I've used it in stuff like egg sandwiches, omelette, pesto and savoury wraps, where I find it's useful as a green that cuts through and lifts other richer ingredients - but I really should do more with it. Any veg-friendly suggestions?

Aha, I just thought of Nasturtiums, leaves and flowers. Though I'd need to grow lots more than I got this year.