Oleo can be used in place of a syrup or in addition to it. I added the lemon juice to the oleo to save the bartenders the step of adding lemon juice to the cocktail per order.
Muddle the peels, sugar, tea and lavender until the citrus gives up its oils and the sugar is damp.
Cover and set in a warm spot for at least 2 hours; overnight is best. Stir occasionally.
Add the hot water and the reserved citrus juice.
Stir to dissolve remaining sugar, and pour mixture through a fine strainer.
Let cool before using in cocktails or in nonalcoholic drinks like a lemonade or iced tea.