Recipe adapted from Serious Eats
This sauce is best when used fresh, but it will keep in the fridge up to 1 week. You can also freeze it in small jars or ice cube trays to use later.
You can use only cilantro, or only parsley in this easy chimichurri sauce. But I love to combination of the two herbs in this recipe. If you have fresh oregano, you can use the leaves from a few sprigs instead of dry oregano.