Well, as far as I've got in my brief search, one source says it's a type of chicory, another says it's a Russian thistle, and a third says it's tumbleweed! Obviously all these plants are botanically related, but the one you're looking for is apparently known as opposite-leaved saltwort in English, and can be used much as you would use chicory or samphire (assuming you would use either of those!) So if you have any chicory or samphire recipes, you're up and running............