Hi Asier. I think it's going to be Sabia, Amaranthus retroflexus. Perhaps it is another of the same genus, such as Amaranthus hybridus.
On unknown grounds, these plants are considered bad. Brought from America. They're edible, both their jaldre when it's new and their seeds. Cut and cut to remove. Cut it off on the next crescent.
192 milioi sagar 2024. urtean. Segundoero sei sagarretik gora saltzen du Britainia Handiko Tesco supermerkatu kate han ezagunak; ia 27.000 tona. Zenbaki ikusgarriak dira baina are harrigarrigoak dira bertokoak, Ingalaterrako sagarrak direla jakinda.