Combine parsley, cilantro, oregano, shallot, garlic, red wine vinegar, salt, and red pepper flakes in food processor and pulse until everything is finely minced.
Add olive oil and pulse until combined. It does not need to be pureed - just incorporated.
In a large bowl, add cubed steak and vegetable pieces.
Add 3 tablespoon of chimichurri to bowl and stir well to combine.
Thread steak and vegetables onto skewers (if using wooden skewers, be sure to soak in water for at least 15 minutes prior to this)
Preheat grill to medium-high heat.
Add kabobs and cook for 3-4 minutes on each side, until meat and vegetables are cooked.
Serve with additional chimichurri. Enjoy!