Preserving fresh herbs in olive oil from http://www.thekitchn.com/freeze-herbs-in-olive-oil-173648. I like this cite.
"Do you use your freezer to preserve herbs, vegetables, or fruit? The
freezer can be a powerful, overlooked method of preserving. I wrote an
article for Vegetarian Times that appears this month in the
July/August issue, all about preserving the good foods of summer by
using the freezer. Pesto, peach puree, tomato soup — stash them away now
for the winter! One of my favorite ingredients, a handful of fresh
herbs from the garden, is one of the simplest things to preserve in the
freezer, and I just learned a new, better way to freeze herbs: In oil!"