Oregano is an herb that was prized by the ancient Greeks. According to mythology, the goddess Aphrodite created it as a gift for man, to bring him joy. In fact, the name for the plant is derived from the Greek for "joy of the mountains." Newly married couples would wear oregano wreaths on their heads, and physicians used it for its medicinal properties, especially as a antiseptic. The plant has continued in popularity through the ages, not just for its medicinal value, but as a spice, as well. One way to make use of the flavorful properties of oregano is to make an oil with the leaves.
Decide on the amount of oil you wish to make. This will determine quantity of ingredients you will need, as well as the size of the containers. The general, for each ounce of oil, you will need an ounce of dried oregano leaves.
Pick oregano leaves from your garden, if you plan to use fresh herbs, and dry them by hanging them in a darkened room. You may, if you prefer, purchase dried herbs instead.
Grind the dried oregano leaves to a powder with a mortar and pestle.
Put the powdered leaves in a sterilized jar and add the equivalent amount of oil. Seal the jar and store in a cool, dark place for a month.
Line a funnel with a coffee filter, and pour the oil through it into a decorative bottle. This will filter out the ground oregano leaves.