These are often prepared in stews with onions, carrots, garlic, ginger and herbs. Edible young greens are produced from various kinds of vegetables, herbs, or other plants. Machis often have extensive knowledge of regional medicinal herbs. The Society publishes a series of books about natural remedies and medicinal herbs. Dressings containing various herbs and seasonings are frequently used in the U.S. Thyme retains its flavour on drying better than many other herbs. The bitters are made from 27 herbs and other ingredients. It uses a combination of dozens of different herbs and fruits. Culpeper spent much time outdoors cataloguing hundreds of medicinal herbs. Yams can be fried, roasted, boiled, or made into a potage with tomatoes and herbs. Tea is also mixed with these traditional herbs. Iran has 80 percent of the world medicinal herbs. They also developed new remedies based on American plants and herbs. The fresh chopped herbs are then added. It is composed of distilled alcohol aged with 130 herbs, plants and flowers.