I love land cress - although it is a little bitter raw on its own, it is terrific added to sandwiches that you might take down to the allotment for lunch - shove some leaves inside a cheese or ham or anything sandwich that needs a bit of greenery. It is good chopped raw into a salad. I have also chopped it into casseroles, omelettes and similar. It runs to flower and seed very quickly if at all stressed (current drought, for example, or transplanting) but the seeds germinate fast and I find it very useful to have patches of it here and there. I have to protect it from deer/birds/whatever grazes it down.