Step 1: Whip up the Marinade: Grab a medium-sized mixing bowl. Pour in the extra virgin olive oil, fresh lemon juice, minced garlic, chopped fresh thyme, and chopped fresh parsley. Give it a good whisk until everything is happily combined. Now, season it with a pinch of salt and black pepper. Give it a little taste – does it need a tiny bit more salt? Adjust it to your liking!
Step 2: Marinate the Chicken: Pop your boneless, skinless chicken breasts into a resealable plastic bag or a shallow dish. Pour that gorgeous marinade right over the top, making sure each piece of chicken is well coated. Squish the bag around a bit (if using) or flip the chicken in the dish. Seal the bag or cover the dish tightly. Now, tuck it into the refrigerator for at least 30 minutes. You can go up to 2 hours for maximum flavor.
Step 3: Heat Up the Grill: While the chicken is chilling and soaking up all that goodness, head outside and preheat your grill to medium-high heat. You're aiming for around 375°F (about 190°C). Once it's hot, carefully brush or wipe the grill grates with a little oil to prevent sticking.
Step 4: Grill 'Em Up: Take the chicken out of the marinade. Let any excess drip off and discard the remaining marinade. Place the chicken breasts directly onto the hot grill grates. Grill for approximately 6-7 minutes on the first side. Then, flip them over and grill for another 6-7 minutes, or until they're cooked through and the internal temperature reaches 165°F (74°C) in the thickest part. Use a meat thermometer to check.
Step 5: Rest (Don't Skip This!): Once the chicken is cooked, transfer it to a clean plate. Loosely tent it with aluminum foil and let it rest for about 5 minutes. This allows the juices to redistribute throughout the meat, making it incredibly tender and juicy.