Begin by fill a glass storage jar with the flowers or leaves of your chosen dried herb.Next, pour in a light vegetable oil to cover the herbs - sunflower or grape seed oil work well.
Then, place the jar on a sunny windowsill for a month. Leave it there to steep. Give it a shake every day.
Strain the flowers or leaves out of the oil. For a stronger infusion, renew the herbs in the oil every two weeks, removing the used flowers or leaves each time.
Pour into stoppered bottles to store.