You can dry it and crumble it for use later.

I strip the leaves off the stems and lay them on 2 layers of paper towel in the microwave, cover them with another layer of towel then nuke them on high for bursts of 30 seconds until dry.

It depends on how big the leaves are as to how long it will take for them to dry crisp.

Just crumble them between your fingers and put in a screw top jar....I reuse the containers I have bought with herbs/spices in.