You probably already enjoy oregano in all manner of Italian dishes. It has an earthy green flavor, just slightly minty and the tiniest bit bitter. Oregano complements a lot of foods, especially those including tomatoes. Oregano is native to Europe, but is now grown all over the world because it is so popular. So you know that oregano is a well-loved herb for seasoning food, but did you know that is has also been used as medicine.