I like olive oil and have a teaspoon most mornings ..... but also on occasions make olive leaf tea from young leaves. I just go out and pick a handful, wash them and pour boiled water over them and after a few minutes you have an excellent drink. Just love my olive trees.
e.g. "Olive leaf tea has been enjoyed for over 3,000 years as a natural approach to managing health & blood pressure. Olive leaf tea is used for inactivating harmful microorganisms [infections], including a remarkably wide range of viruses, bacteria and funguses. It exhibits powerful anti-parasitic and anti-fungal properties similar to green tea, rooibos, yerba matè, echinacea, ginseng & others."
