Creating The Best Grilled Chicken Sandwich is a simple process. Follow these steps to ensure success:

1. Prepare the Marinade: In a bowl, whisk together the olive oil, lemon juice, minced garlic, oregano, paprika, salt, and black pepper.
2. Marinate Chicken: Place the chicken breasts in a resealable plastic bag or a shallow dish. Pour the marinade over the chicken, ensuring all pieces are well coated. Seal and refrigerate for at least 30 minutes.
3. Preheat the Grill: Heat your grill to medium-high heat. Lightly oil the grates to prevent sticking.
4. Grill Chicken: Remove the chicken from the marinade and discard any remaining marinade. Grill the chicken breasts for 6-7 minutes per side, or until the internal temperature reaches 165°F (74°C).
5. Rest the Chicken: Once cooked, remove the chicken from the grill and allow it to rest for 5 minutes. This helps retain its juices.
6. Assemble the Sandwich: While the chicken is resting, toast the sandwich buns on the grill for about 1-2 minutes.
7. Slice Chicken: Once rested, slice the grilled chicken breasts.
8. Build Your Sandwich: On the bottom half of each bun, place a lettuce leaf, followed by a slice of tomato and avocado if desired. Add sliced grilled chicken on top and spread mayonnaise or your favorite sauce as desired. Complete the sandwich by adding the top half of the bun.
9. Serve Immediately: Slice the sandwich in half if desired and serve immediately while hot.

These straightforward steps will help you create a sandwich that is both flavorful and fulfilling.