using wild lavender before it blooms the easiest way to extract the oils, simply use a mortar & pestle to crush it until you can clearly smell the lavender.
to make simple syrup, simply throw lavender and fennel in a small saucepan over medium w/ sugar and stir until fragrant. add water and warm until it dissolves, it might turn a syrupy brown, no worries. let come to room temperature and strain.
while lavender/fennel simple syrup is coming to room temperature squeeze the oranges, each orange squeezed yields about 2 ounces. if you want several drinks, squeeze several oranges.
into your shaker add your ice, your gin, lavender simple syrup, and oj. shake it for a good 30 seconds and then strain into your favorite cocktail glass.