How are mature, black, slightly harder Allium vineale seeds utilized?

They are used as an oniony seasoning sprinkled over focaccia or hard-boiled eggs.

The reproductive cycle of the onion grass offers multiple culinary opportunities depending on the maturity of the seeds found in the seedpods. When the seeds are young, tender, and white, they are best suited for pickling to serve as a mild caper substitute. However, once the seeds complete their maturation process, they become black and slightly harder. At this stage, they are separated from their heads and are best repurposed as a dried, concentrated seasoning. This finished seasoning can be sprinkled directly onto baked goods like focaccia bread or used as a flavorful garnish over dishes such as hard-boiled eggs, adding a distinct oniony note.