When it starts to flower, harvest it so you can use it anytime of the year.
Cut the cilantro close to the ground.
Separate any stray leaves, sticks or other debris.
Throw away (or back in the garden) anything but cilantro.
Place cilantro, stems and all, in a processor or blender.
(Actually the stems have the most flavor.)
Add a little olive oil.
Process until it becomes paste.
Place the paste in a mason jar and store in the refrigerator to use whenever you please in anything and everything!