Cos or Romaine hearts cut into quarters and whacked on a grill for some charring is pretty good too.
"Horta" is any green leaves you like, blanched and served with oil and lemon. Sure, it tends to be Dandelion or Rocket or whatever, but I don't think it's specified by the greek ya-yas, its whatever is to hand.
Grilled Hispy (?) Cabbage is apparently a thing in cuisine in the UK, if Great British Menu is anything to go by. Typically grilled on an actual fire, at least in most of the episodes I've seen.
I am just back from a trip to Yokohama and was served steamed cabbage heart which had been put into a wooden steamer and cooked over a charcoal fire. It was both steamy-soft, and smokey and delicious to offset the yakitori.
I think cabbage is a universal in climates with a real winter: its hardy, it grows into the colder months if you let it, its viable for pickling and salting, and flatulance aside is great nourishment. Shame that kids hate it, but eh, the ones which survive fatten up fast on it, so there's protein latent in cabbage if you need it.
Cabbage in school meals in the 60s was indeed served in an ice-cream scoop puddle next to the mince and tatties (or haggis, being scotland)
I was raised on iceberg lettuce - IMHO bitter biowaste - and discovered the joys of cabbage only later in life. My point being: If you're used to lettuce, give shredded cabbage a try. Not cole slaw, smothered in mayo. Try it with (say) a bit of sesame oil and some sesame seeds.
"Horta" is any green leaves you like, blanched and served with oil and lemon. Sure, it tends to be Dandelion or Rocket or whatever, but I don't think it's specified by the greek ya-yas, its whatever is to hand.