01 - Place garlic scapes, parsley, cilantro (or oregano), shallot, and chili or red pepper flakes in the bowl of a food processor or blender.
02 - Pulse the mixture until all ingredients are finely chopped and well combined, scraping down the sides as needed.
03 - Pour in the olive oil, red wine vinegar, lemon juice, salt, and pepper. Pulse until a thick, textured sauce forms, stopping to scrape down the bowl periodically.
04 - If the sauce is too thick, add water one tablespoon at a time, pulsing briefly between additions until desired consistency is reached.
05 - Taste the chimichurri and adjust seasoning with additional salt, pepper, or lemon juice as desired.
06 - Serve immediately over grilled meats, poultry, seafood, or vegetables. Store leftovers in an airtight container in the refrigerator for up to 3 days.