In a large shallow bowl, whisk together the marinade ingredients: olive oil, lime juice, orange juice, lime zest, cilantro, garlic, honey, red pepper flakes, Fajita seasoning, smoked paprika, and salt until fully combined. The mixture should be aromatic and vibrant.
Add the two chicken breasts to the marinade. Make a few piercings in the chicken with a fork to allow the flavors to penetrate. Ensure that the chicken is fully submerged in the marinade. Cover the bowl with plastic wrap and let it marinate in the fridge for 1 to 2 hours. This step is crucial for flavor infusion.
While the chicken is marinating, prepare the dressing. In a food processor, combine the sour cream, mayo, lime juice, and a pinch of salt. Pulse until smooth and creamy, then taste and adjust seasoning if necessary. This dressing will complement the salad beautifully.
Once marinated, heat your grill or grill pan over medium-high heat. Brush it lightly with oil to prevent sticking. When the grill is hot, add the marinated chicken breasts. Grill them for about 6 to 7 minutes on each side, or until they are golden and crispy. To check for doneness, cut into the center of the chicken; it should be no longer pink.
After grilling, remove the chicken from the grill and place it on a plate. Cover with foil and let the chicken rest for about 5 minutes. This helps the juices redistribute, making the chicken tender.
Next, add a little more oil to the grill or pan and toss in the bell peppers and onion slices. Grill them for about 4 to 5 minutes, turning occasionally until they are soft with a slight char, yet still retain some crunch.
Once grilled, remove the veggies from the heat. Slice the rested chicken into strips. You can do this while the veggies are cooking to save time.
To assemble your salad, take a large serving platter or divide the Romaine lettuce among four plates. Arrange the grilled chicken and veggies artfully on top.
Add sliced avocado to each plate. Drizzle the creamy dressing generously over the salad and garnish with extra cilantro leaves. It’s all about presentation!
Finally, serve your Grilled Chicken Fajita Salad immediately and enjoy the refreshing flavors of summer on your plate!