Chimichurri Sauce is also known as Argentine Green Sauce for the green herbs it contains. Oregano is often added to the mixture. If you’re shopping where Latin ingredients are common, look for Mexican oregano, a stronger-flavored cousin to oregano usually available in markets.
There’s no reason to waste a drop of Chimichurri Sauce. It can liven up grilled chicken breasts or add a sassy flavor to plain old burgers. Just spoon some on after cooking.