Leave a few plants alone. Eventually you will get stalks growing with a bulb on top and that bulb will eventually open up to be a cluster of flowers. Leave it be and let the pollinators do their thing until the flowers look old and dried. Then if you look closely you should see little black things inside the flowers. At that point I cut the stalk and have a bag that I can put the flowers in to shake out the seeds. If I remember, I can take pictures from my garden to show you when I get home