1. Preheat your grill to medium-high heat. Ensure that the grates are clean and lightly oiled to prevent sticking.
2. In a small bowl, combine the olive oil, minced garlic, paprika, dried thyme, dried oregano, salt, and black pepper. Stir well to create a marinade.
3. Place the chicken breast fillets in a shallow dish or a resealable plastic bag. Pour the marinade over the chicken, ensuring that both sides are coated evenly. Allow the chicken to marinate for at least 20 minutes, or refrigerate for up to 4 hours for enhanced flavor.
4. Remove the chicken from the marinade and let any excess marinade drip off. Discard the remaining marinade.
5. Place the chicken breast fillets on the preheated grill. Close the lid and cook for approximately 6-8 minutes per side, or until the internal temperature reaches 74°C. Cooking time may vary depending on the thickness of the fillets. Avoid overcooking to maintain juiciness.
6. Once cooked, transfer the chicken to a clean plate and let it rest for a few minutes. This allows the juices to redistribute and ensures a tender, juicy result.
7. Serve the grilled chicken breast fillets with fresh lemon wedges on the side for a refreshing touch. If desired, garnish with chopped fresh parsley for added freshness and presentation.
8. Enjoy your delicious and juicy grilled chicken breast fillets alongside your favorite side dishes, such as grilled vegetables, rice, or a crisp salad.

Note: You can also experiment with additional seasonings and herbs, such as cumin, chili powder, or rosemary, to personalize the flavor of your grilled chicken. Adjust the marinade ingredients accordingly based on your preferences.