Last year I have sown some sort of lettuce (I thought). It was growing fast and very good as a tougher lettuce or, when a little older, as a leafy green for a stir fry.
I have no idea what the name would be in English, but I will add a foto.
What I liked a lot about it is, it goes on through winter time! Do you get as bored as I do with all the carrots, beets and bulbs? This, together with chicory is such a nice change
Plantago coronopus is the Latin name