01 - Place garlic scapes, parsley, cilantro or oregano, shallot, and chili or red pepper flakes in a food processor or blender.
02 - Pulse the mixture until all ingredients are finely chopped and evenly incorporated.
03 - Pour in olive oil, red wine vinegar, lemon juice, salt, and pepper. Pulse until a thick, textured sauce forms with small visible herb pieces.
04 - Add 1 tablespoon water if the sauce appears too thick, pulsing briefly to incorporate. The final texture should be spoonable but not watery.
05 - Sample the chimichurri and adjust salt, pepper, or acid balance as desired. Add more vinegar or lemon juice for brightness.
06 - Spoon immediately over grilled meats, poultry, seafood, or vegetables. Transfer leftovers to an airtight container and refrigerate for up to 3 days.