Originating from the mountains of Greece, oregano is an herb that's been used in various ways for centuries. A part of the mint family, not only has it been used to flavor food, but it has also been used in herbal medicine to treat many health conditions. Bold and earthy, oregano subtly straddles a sweet and spicy flavor profile, providing a slightly more bitter taste and savory counterpart to marjoram, another herb that's a member of the mint family. It's an aromatic herb whose leaves work well fresh or dried.