Wash and prep the herbs by picking out any large, tough stems. Smaller, tender stems are ok to use.
Add the parlsey, cilantro, garlic, shallot, salt, pepper, red pepper flakes and oregano to a mini food processor or chopper and pulse a few times to chop and combine. You don't want to pulverize or completely blend the mixture, just finely chop.
Transfer the mixture to a bowl or container or remove the blade and add the oil and vinegar to the food processor container. Stir to combine.
Taste chimichurri and season if needed with more salt, pepper or chili flakes. You can also add a squeeze of fresh lemon juice to help brighten the flavour.
If possible, let chimichurri rest at room temperature for 15-30 minutes to allow flavours to meld then use to add flavour to a variety of dishes like rice, eggs, tofu, sandwiches, meats, fish, bowls, salads, roasted veggies and more.
Store leftover chimichurri in an airtight container in the fridge for up to 3 days.