Add the clementines, grapefruit and rosemary to a large clean, dry mason jar.  Add the honey and mash the fruit with the honey with a muddler.  Put a lid on the jar and put the jar in the fridge for 2-3 days.  Shake the jar each day.

After 48-72 hours have passed pour the contents of the jar in a blender or food processor and pulse a couple of times.  Pour the liquid through a fine mesh sieve into a clean jar. Add the apple cider vinegar and mix.  Put a lid on the jar (use parchment in between if the lid is metal). Let the mixture sit in the fridge for another 24 hours.

To serve pour the syrup in a glass and top with soda water.   This mixes really well with vodka too 😉