If you're looking for a new dinner to try, you can never go wrong with these flavorful chimichurri chicken skewers. It's so good, it'll be a total hit for sure!
Add the parsley, cilantro, basil, oregano, olive oil, red wine vinegar, garlic, and crushed red pepper flakes (if using) to a blender or food processor. Blend until smooth, about 30 seconds. Taste and adjust — if it tastes too sharp, add an extra splash of olive oil to mellow it out. Set aside half of the chimichurri in a separate bowl for serving (do not let it touch raw chicken).
Cut the chicken breasts into 1-inch (2.5cm) cubes. Season all over with the kosher salt and black pepper. Thread the chicken pieces onto skewers, leaving a small gap between each piece to ensure even cooking. If using bamboo skewers, soak them in water for at least 30 minutes before threading to prevent burning.
Preheat the grill to medium-high heat, approximately 400°F / 200°C. Brush the skewered chicken generously on all sides with chimichurri sauce from the basting portion.
Place the skewers on the grill and cook for 4–5 minutes per side, turning occasionally, until the chicken is lightly charred and reaches an internal temperature of 165°F / 74°C. Baste with additional chimichurri halfway through grilling.
Serve the grilled skewers immediately with the reserved (uncontaminated) chimichurri sauce on the side for dipping.