To a small bowl, add the 1/2 cup fresh parsley, 1/2 cup fresh cilantro, 2 green onions, 2-3 cloves garlic, 1 red chili, 1/2 teaspoon dried oregano, and 1/2 teaspoon dried basil. Add the 1/3 cup olive oil, 1 tablespoon red or white wine vinegar, Kosher salt and ground pepper, and mix well to combine.
Allow the flavors to meld for 10 minutes.
Pour about ⅓ of the chimichurri sauce over the 4 skinless boneless chicken breasts and toss to coat completely. Reserve the remaining chimichurri to serve with the chicken; ensure it doesn't come into contact with the raw meat.
Allow the chicken to marinate for 15-20 minutes.
Preheat a grill pan or your outside grill on medium-high heat. Add the chicken and cook for 6-8 minutes per side, or until fully cooked through.
Serve with the remaining chimichurri sauce and enjoy!
Notes
Use lean chicken breasts. If you prefer to use chicken thighs, you can use boneless chicken thighs instead.
Alternate source of protein could be shrimp or steaks
You may use an outdoor or indoor grill
Must use fresh parsley and fresh garlic
Do not overcook the chicken so it's not too dry and rubbery
If you can, do marinate the chicken; unless you are in a rush, you can skip marinating.
Store leftovers in a sealed container in the fridge for up to 3 days.