Take the chicken thighs out of the fridge 20-30 minutes prior to cooking
Pat dry and quickly marinade with juice from half a lemon, a good drizzle of olive oil, and seasoning of your choice. Make sure the chicken is evenly coated with the marinade.
Preheat grill to 375/400 degrees
Assemble the first part of the chimichurri sauce: minced garlic, minced shallot, red pepper flakes, juice from the other lemon half, and red wine vinegar. Mix and let sit while we cook the chicken.
Grill chicken thighs for 4-5 minutes on each side so you have a nice char and the internal temperature reaches 165 degrees.
Grill scallions until slightly charred and chop finely. Chop parsley finely as well.
Add chopped grilled scallions and parsley to the chimichurri sauce, a pinch of salt, and olive oil. Stir to combine and drizzle over the chicken.